diff options
Diffstat (limited to 'node_modules/async/dist/async.js')
| -rw-r--r-- | node_modules/async/dist/async.js | 6238 |
1 files changed, 1038 insertions, 5200 deletions
diff --git a/node_modules/async/dist/async.js b/node_modules/async/dist/async.js index bb95651b4..31e7620fb 100644 --- a/node_modules/async/dist/async.js +++ b/node_modules/async/dist/async.js @@ -1,5427 +1,1265 @@ -(function (global, factory) { - typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : - typeof define === 'function' && define.amd ? define(['exports'], factory) : - (factory((global.async = global.async || {}))); -}(this, (function (exports) { 'use strict'; - -/** - * This method returns the first argument it receives. +/*! + * async + * https://github.com/caolan/async * - * @static - * @since 0.1.0 - * @memberOf _ - * @category Util - * @param {*} value Any value. - * @returns {*} Returns `value`. - * @example - * - * var object = { 'a': 1 }; - * - * console.log(_.identity(object) === object); - * // => true + * Copyright 2010-2014 Caolan McMahon + * Released under the MIT license */ -function identity(value) { - return value; -} +(function () { -/** - * A faster alternative to `Function#apply`, this function invokes `func` - * with the `this` binding of `thisArg` and the arguments of `args`. - * - * @private - * @param {Function} func The function to invoke. - * @param {*} thisArg The `this` binding of `func`. - * @param {Array} args The arguments to invoke `func` with. - * @returns {*} Returns the result of `func`. - */ -function apply(func, thisArg, args) { - switch (args.length) { - case 0: return func.call(thisArg); - case 1: return func.call(thisArg, args[0]); - case 2: return func.call(thisArg, args[0], args[1]); - case 3: return func.call(thisArg, args[0], args[1], args[2]); - } - return func.apply(thisArg, args); -} - -/* Built-in method references for those with the same name as other `lodash` methods. */ -var nativeMax = Math.max; - -/** - * A specialized version of `baseRest` which transforms the rest array. - * - * @private - * @param {Function} func The function to apply a rest parameter to. - * @param {number} [start=func.length-1] The start position of the rest parameter. - * @param {Function} transform The rest array transform. - * @returns {Function} Returns the new function. - */ -function overRest(func, start, transform) { - start = nativeMax(start === undefined ? (func.length - 1) : start, 0); - return function() { - var args = arguments, - index = -1, - length = nativeMax(args.length - start, 0), - array = Array(length); - - while (++index < length) { - array[index] = args[start + index]; + var async = {}; + function noop() {} + function identity(v) { + return v; } - index = -1; - var otherArgs = Array(start + 1); - while (++index < start) { - otherArgs[index] = args[index]; + function toBool(v) { + return !!v; + } + function notId(v) { + return !v; } - otherArgs[start] = transform(array); - return apply(func, this, otherArgs); - }; -} - -/** - * Creates a function that returns `value`. - * - * @static - * @memberOf _ - * @since 2.4.0 - * @category Util - * @param {*} value The value to return from the new function. - * @returns {Function} Returns the new constant function. - * @example - * - * var objects = _.times(2, _.constant({ 'a': 1 })); - * - * console.log(objects); - * // => [{ 'a': 1 }, { 'a': 1 }] - * - * console.log(objects[0] === objects[1]); - * // => true - */ -function constant(value) { - return function() { - return value; - }; -} - -/** - * Checks if `value` is the - * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types) - * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) - * - * @static - * @memberOf _ - * @since 0.1.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an object, else `false`. - * @example - * - * _.isObject({}); - * // => true - * - * _.isObject([1, 2, 3]); - * // => true - * - * _.isObject(_.noop); - * // => true - * - * _.isObject(null); - * // => false - */ -function isObject(value) { - var type = typeof value; - return value != null && (type == 'object' || type == 'function'); -} - -/** `Object#toString` result references. */ -var funcTag = '[object Function]'; -var genTag = '[object GeneratorFunction]'; -var proxyTag = '[object Proxy]'; - -/** Used for built-in method references. */ -var objectProto$1 = Object.prototype; - -/** - * Used to resolve the - * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) - * of values. - */ -var objectToString = objectProto$1.toString; - -/** - * Checks if `value` is classified as a `Function` object. - * - * @static - * @memberOf _ - * @since 0.1.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a function, else `false`. - * @example - * - * _.isFunction(_); - * // => true - * - * _.isFunction(/abc/); - * // => false - */ -function isFunction(value) { - // The use of `Object#toString` avoids issues with the `typeof` operator - // in Safari 9 which returns 'object' for typed array and other constructors. - var tag = isObject(value) ? objectToString.call(value) : ''; - return tag == funcTag || tag == genTag || tag == proxyTag; -} - -/** Detect free variable `global` from Node.js. */ -var freeGlobal = typeof global == 'object' && global && global.Object === Object && global; - -/** Detect free variable `self`. */ -var freeSelf = typeof self == 'object' && self && self.Object === Object && self; -/** Used as a reference to the global object. */ -var root = freeGlobal || freeSelf || Function('return this')(); + // global on the server, window in the browser + var previous_async; -/** Used to detect overreaching core-js shims. */ -var coreJsData = root['__core-js_shared__']; + // Establish the root object, `window` (`self`) in the browser, `global` + // on the server, or `this` in some virtual machines. We use `self` + // instead of `window` for `WebWorker` support. + var root = typeof self === 'object' && self.self === self && self || + typeof global === 'object' && global.global === global && global || + this; -/** Used to detect methods masquerading as native. */ -var maskSrcKey = (function() { - var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || ''); - return uid ? ('Symbol(src)_1.' + uid) : ''; -}()); + if (root != null) { + previous_async = root.async; + } -/** - * Checks if `func` has its source masked. - * - * @private - * @param {Function} func The function to check. - * @returns {boolean} Returns `true` if `func` is masked, else `false`. - */ -function isMasked(func) { - return !!maskSrcKey && (maskSrcKey in func); -} + async.noConflict = function () { + root.async = previous_async; + return async; + }; -/** Used for built-in method references. */ -var funcProto$1 = Function.prototype; + function only_once(fn) { + return function() { + if (fn === null) throw new Error("Callback was already called."); + fn.apply(this, arguments); + fn = null; + }; + } -/** Used to resolve the decompiled source of functions. */ -var funcToString$1 = funcProto$1.toString; + function _once(fn) { + return function() { + if (fn === null) return; + fn.apply(this, arguments); + fn = null; + }; + } -/** - * Converts `func` to its source code. - * - * @private - * @param {Function} func The function to process. - * @returns {string} Returns the source code. - */ -function toSource(func) { - if (func != null) { - try { - return funcToString$1.call(func); - } catch (e) {} - try { - return (func + ''); - } catch (e) {} - } - return ''; -} - -/** - * Used to match `RegExp` - * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns). - */ -var reRegExpChar = /[\\^$.*+?()[\]{}|]/g; + //// cross-browser compatiblity functions //// -/** Used to detect host constructors (Safari). */ -var reIsHostCtor = /^\[object .+?Constructor\]$/; + var _toString = Object.prototype.toString; -/** Used for built-in method references. */ -var funcProto = Function.prototype; -var objectProto = Object.prototype; + var _isArray = Array.isArray || function (obj) { + return _toString.call(obj) === '[object Array]'; + }; -/** Used to resolve the decompiled source of functions. */ -var funcToString = funcProto.toString; + // Ported from underscore.js isObject + var _isObject = function(obj) { + var type = typeof obj; + return type === 'function' || type === 'object' && !!obj; + }; -/** Used to check objects for own properties. */ -var hasOwnProperty = objectProto.hasOwnProperty; + function _isArrayLike(arr) { + return _isArray(arr) || ( + // has a positive integer length property + typeof arr.length === "number" && + arr.length >= 0 && + arr.length % 1 === 0 + ); + } -/** Used to detect if a method is native. */ -var reIsNative = RegExp('^' + - funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&') - .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' -); + function _arrayEach(arr, iterator) { + var index = -1, + length = arr.length; -/** - * The base implementation of `_.isNative` without bad shim checks. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a native function, - * else `false`. - */ -function baseIsNative(value) { - if (!isObject(value) || isMasked(value)) { - return false; - } - var pattern = isFunction(value) ? reIsNative : reIsHostCtor; - return pattern.test(toSource(value)); -} - -/** - * Gets the value at `key` of `object`. - * - * @private - * @param {Object} [object] The object to query. - * @param {string} key The key of the property to get. - * @returns {*} Returns the property value. - */ -function getValue(object, key) { - return object == null ? undefined : object[key]; -} + while (++index < length) { + iterator(arr[index], index, arr); + } + } -/** - * Gets the native function at `key` of `object`. - * - * @private - * @param {Object} object The object to query. - * @param {string} key The key of the method to get. - * @returns {*} Returns the function if it's native, else `undefined`. - */ -function getNative(object, key) { - var value = getValue(object, key); - return baseIsNative(value) ? value : undefined; -} - -var defineProperty = (function() { - try { - var func = getNative(Object, 'defineProperty'); - func({}, '', {}); - return func; - } catch (e) {} -}()); + function _map(arr, iterator) { + var index = -1, + length = arr.length, + result = Array(length); -/** - * The base implementation of `setToString` without support for hot loop shorting. - * - * @private - * @param {Function} func The function to modify. - * @param {Function} string The `toString` result. - * @returns {Function} Returns `func`. - */ -var baseSetToString = !defineProperty ? identity : function(func, string) { - return defineProperty(func, 'toString', { - 'configurable': true, - 'enumerable': false, - 'value': constant(string), - 'writable': true - }); -}; - -/** Used to detect hot functions by number of calls within a span of milliseconds. */ -var HOT_COUNT = 500; -var HOT_SPAN = 16; - -/* Built-in method references for those with the same name as other `lodash` methods. */ -var nativeNow = Date.now; - -/** - * Creates a function that'll short out and invoke `identity` instead - * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN` - * milliseconds. - * - * @private - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new shortable function. - */ -function shortOut(func) { - var count = 0, - lastCalled = 0; - - return function() { - var stamp = nativeNow(), - remaining = HOT_SPAN - (stamp - lastCalled); - - lastCalled = stamp; - if (remaining > 0) { - if (++count >= HOT_COUNT) { - return arguments[0]; - } - } else { - count = 0; + while (++index < length) { + result[index] = iterator(arr[index], index, arr); + } + return result; } - return func.apply(undefined, arguments); - }; -} - -/** - * Sets the `toString` method of `func` to return `string`. - * - * @private - * @param {Function} func The function to modify. - * @param {Function} string The `toString` result. - * @returns {Function} Returns `func`. - */ -var setToString = shortOut(baseSetToString); -/** - * The base implementation of `_.rest` which doesn't validate or coerce arguments. - * - * @private - * @param {Function} func The function to apply a rest parameter to. - * @param {number} [start=func.length-1] The start position of the rest parameter. - * @returns {Function} Returns the new function. - */ -function baseRest$1(func, start) { - return setToString(overRest(func, start, identity), func + ''); -} - -var initialParams = function (fn) { - return baseRest$1(function (args /*..., callback*/) { - var callback = args.pop(); - fn.call(this, args, callback); - }); -}; + function _range(count) { + return _map(Array(count), function (v, i) { return i; }); + } -function applyEach$1(eachfn) { - return baseRest$1(function (fns, args) { - var go = initialParams(function (args, callback) { - var that = this; - return eachfn(fns, function (fn, cb) { - fn.apply(that, args.concat([cb])); - }, callback); + function _reduce(arr, iterator, memo) { + _arrayEach(arr, function (x, i, a) { + memo = iterator(memo, x, i, a); }); - if (args.length) { - return go.apply(this, args); - } else { - return go; - } - }); -} + return memo; + } -/** Used as references for various `Number` constants. */ -var MAX_SAFE_INTEGER = 9007199254740991; + function _forEachOf(object, iterator) { + _arrayEach(_keys(object), function (key) { + iterator(object[key], key); + }); + } -/** - * Checks if `value` is a valid array-like length. - * - * **Note:** This method is loosely based on - * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength). - * - * @static - * @memberOf _ - * @since 4.0.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a valid length, else `false`. - * @example - * - * _.isLength(3); - * // => true - * - * _.isLength(Number.MIN_VALUE); - * // => false - * - * _.isLength(Infinity); - * // => false - * - * _.isLength('3'); - * // => false - */ -function isLength(value) { - return typeof value == 'number' && - value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; -} - -/** - * Checks if `value` is array-like. A value is considered array-like if it's - * not a function and has a `value.length` that's an integer greater than or - * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`. - * - * @static - * @memberOf _ - * @since 4.0.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is array-like, else `false`. - * @example - * - * _.isArrayLike([1, 2, 3]); - * // => true - * - * _.isArrayLike(document.body.children); - * // => true - * - * _.isArrayLike('abc'); - * // => true - * - * _.isArrayLike(_.noop); - * // => false - */ -function isArrayLike(value) { - return value != null && isLength(value.length) && !isFunction(value); -} + function _indexOf(arr, item) { + for (var i = 0; i < arr.length; i++) { + if (arr[i] === item) return i; + } + return -1; + } -/** - * This method returns `undefined`. - * - * @static - * @memberOf _ - * @since 2.3.0 - * @category Util - * @example - * - * _.times(2, _.noop); - * // => [undefined, undefined] - */ -function noop() { - // No operation performed. -} - -function once(fn) { - return function () { - if (fn === null) return; - var callFn = fn; - fn = null; - callFn.apply(this, arguments); + var _keys = Object.keys || function (obj) { + var keys = []; + for (var k in obj) { + if (obj.hasOwnProperty(k)) { + keys.push(k); + } + } + return keys; }; -} - -var iteratorSymbol = typeof Symbol === 'function' && Symbol.iterator; - -var getIterator = function (coll) { - return iteratorSymbol && coll[iteratorSymbol] && coll[iteratorSymbol](); -}; - -/** - * The base implementation of `_.times` without support for iteratee shorthands - * or max array length checks. - * - * @private - * @param {number} n The number of times to invoke `iteratee`. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns the array of results. - */ -function baseTimes(n, iteratee) { - var index = -1, - result = Array(n); - - while (++index < n) { - result[index] = iteratee(index); - } - return result; -} - -/** - * Checks if `value` is object-like. A value is object-like if it's not `null` - * and has a `typeof` result of "object". - * - * @static - * @memberOf _ - * @since 4.0.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is object-like, else `false`. - * @example - * - * _.isObjectLike({}); - * // => true - * - * _.isObjectLike([1, 2, 3]); - * // => true - * - * _.isObjectLike(_.noop); - * // => false - * - * _.isObjectLike(null); - * // => false - */ -function isObjectLike(value) { - return value != null && typeof value == 'object'; -} - -/** `Object#toString` result references. */ -var argsTag = '[object Arguments]'; - -/** Used for built-in method references. */ -var objectProto$4 = Object.prototype; - -/** - * Used to resolve the - * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) - * of values. - */ -var objectToString$1 = objectProto$4.toString; - -/** - * The base implementation of `_.isArguments`. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an `arguments` object, - */ -function baseIsArguments(value) { - return isObjectLike(value) && objectToString$1.call(value) == argsTag; -} - -/** Used for built-in method references. */ -var objectProto$3 = Object.prototype; - -/** Used to check objects for own properties. */ -var hasOwnProperty$2 = objectProto$3.hasOwnProperty; - -/** Built-in value references. */ -var propertyIsEnumerable = objectProto$3.propertyIsEnumerable; - -/** - * Checks if `value` is likely an `arguments` object. - * - * @static - * @memberOf _ - * @since 0.1.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an `arguments` object, - * else `false`. - * @example - * - * _.isArguments(function() { return arguments; }()); - * // => true - * - * _.isArguments([1, 2, 3]); - * // => false - */ -var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) { - return isObjectLike(value) && hasOwnProperty$2.call(value, 'callee') && - !propertyIsEnumerable.call(value, 'callee'); -}; -/** - * Checks if `value` is classified as an `Array` object. - * - * @static - * @memberOf _ - * @since 0.1.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an array, else `false`. - * @example - * - * _.isArray([1, 2, 3]); - * // => true - * - * _.isArray(document.body.children); - * // => false - * - * _.isArray('abc'); - * // => false - * - * _.isArray(_.noop); - * // => false - */ -var isArray = Array.isArray; - -/** - * This method returns `false`. - * - * @static - * @memberOf _ - * @since 4.13.0 - * @category Util - * @returns {boolean} Returns `false`. - * @example - * - * _.times(2, _.stubFalse); - * // => [false, false] - */ -function stubFalse() { - return false; -} - -/** Detect free variable `exports`. */ -var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports; - -/** Detect free variable `module`. */ -var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module; - -/** Detect the popular CommonJS extension `module.exports`. */ -var moduleExports = freeModule && freeModule.exports === freeExports; - -/** Built-in value references. */ -var Buffer = moduleExports ? root.Buffer : undefined; - -/* Built-in method references for those with the same name as other `lodash` methods. */ -var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined; - -/** - * Checks if `value` is a buffer. - * - * @static - * @memberOf _ - * @since 4.3.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a buffer, else `false`. - * @example - * - * _.isBuffer(new Buffer(2)); - * // => true - * - * _.isBuffer(new Uint8Array(2)); - * // => false - */ -var isBuffer = nativeIsBuffer || stubFalse; - -/** Used as references for various `Number` constants. */ -var MAX_SAFE_INTEGER$1 = 9007199254740991; - -/** Used to detect unsigned integer values. */ -var reIsUint = /^(?:0|[1-9]\d*)$/; - -/** - * Checks if `value` is a valid array-like index. - * - * @private - * @param {*} value The value to check. - * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. - * @returns {boolean} Returns `true` if `value` is a valid index, else `false`. - */ -function isIndex(value, length) { - length = length == null ? MAX_SAFE_INTEGER$1 : length; - return !!length && - (typeof value == 'number' || reIsUint.test(value)) && - (value > -1 && value % 1 == 0 && value < length); -} - -/** `Object#toString` result references. */ -var argsTag$1 = '[object Arguments]'; -var arrayTag = '[object Array]'; -var boolTag = '[object Boolean]'; -var dateTag = '[object Date]'; -var errorTag = '[object Error]'; -var funcTag$1 = '[object Function]'; -var mapTag = '[object Map]'; -var numberTag = '[object Number]'; -var objectTag = '[object Object]'; -var regexpTag = '[object RegExp]'; -var setTag = '[object Set]'; -var stringTag = '[object String]'; -var weakMapTag = '[object WeakMap]'; - -var arrayBufferTag = '[object ArrayBuffer]'; -var dataViewTag = '[object DataView]'; -var float32Tag = '[object Float32Array]'; -var float64Tag = '[object Float64Array]'; -var int8Tag = '[object Int8Array]'; -var int16Tag = '[object Int16Array]'; -var int32Tag = '[object Int32Array]'; -var uint8Tag = '[object Uint8Array]'; -var uint8ClampedTag = '[object Uint8ClampedArray]'; -var uint16Tag = '[object Uint16Array]'; -var uint32Tag = '[object Uint32Array]'; - -/** Used to identify `toStringTag` values of typed arrays. */ -var typedArrayTags = {}; -typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = -typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = -typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = -typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = -typedArrayTags[uint32Tag] = true; -typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] = -typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = -typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = -typedArrayTags[errorTag] = typedArrayTags[funcTag$1] = -typedArrayTags[mapTag] = typedArrayTags[numberTag] = -typedArrayTags[objectTag] = typedArrayTags[regexpTag] = -typedArrayTags[setTag] = typedArrayTags[stringTag] = -typedArrayTags[weakMapTag] = false; - -/** Used for built-in method references. */ -var objectProto$5 = Object.prototype; - -/** - * Used to resolve the - * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) - * of values. - */ -var objectToString$2 = objectProto$5.toString; - -/** - * The base implementation of `_.isTypedArray` without Node.js optimizations. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a typed array, else `false`. - */ -function baseIsTypedArray(value) { - return isObjectLike(value) && - isLength(value.length) && !!typedArrayTags[objectToString$2.call(value)]; -} - -/** - * The base implementation of `_.unary` without support for storing metadata. - * - * @private - * @param {Function} func The function to cap arguments for. - * @returns {Function} Returns the new capped function. - */ -function baseUnary(func) { - return function(value) { - return func(value); - }; -} - -/** Detect free variable `exports`. */ -var freeExports$1 = typeof exports == 'object' && exports && !exports.nodeType && exports; - -/** Detect free variable `module`. */ -var freeModule$1 = freeExports$1 && typeof module == 'object' && module && !module.nodeType && module; - -/** Detect the popular CommonJS extension `module.exports`. */ -var moduleExports$1 = freeModule$1 && freeModule$1.exports === freeExports$1; - -/** Detect free variable `process` from Node.js. */ -var freeProcess = moduleExports$1 && freeGlobal.process; - -/** Used to access faster Node.js helpers. */ -var nodeUtil = (function() { - try { - return freeProcess && freeProcess.binding('util'); - } catch (e) {} -}()); - -/* Node.js helper references. */ -var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray; - -/** - * Checks if `value` is classified as a typed array. - * - * @static - * @memberOf _ - * @since 3.0.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a typed array, else `false`. - * @example - * - * _.isTypedArray(new Uint8Array); - * // => true - * - * _.isTypedArray([]); - * // => false - */ -var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray; - -/** Used for built-in method references. */ -var objectProto$2 = Object.prototype; - -/** Used to check objects for own properties. */ -var hasOwnProperty$1 = objectProto$2.hasOwnProperty; - -/** - * Creates an array of the enumerable property names of the array-like `value`. - * - * @private - * @param {*} value The value to query. - * @param {boolean} inherited Specify returning inherited property names. - * @returns {Array} Returns the array of property names. - */ -function arrayLikeKeys(value, inherited) { - var isArr = isArray(value), - isArg = !isArr && isArguments(value), - isBuff = !isArr && !isArg && isBuffer(value), - isType = !isArr && !isArg && !isBuff && isTypedArray(value), - skipIndexes = isArr || isArg || isBuff || isType, - result = skipIndexes ? baseTimes(value.length, String) : [], - length = result.length; - - for (var key in value) { - if ((inherited || hasOwnProperty$1.call(value, key)) && - !(skipIndexes && ( - // Safari 9 has enumerable `arguments.length` in strict mode. - key == 'length' || - // Node.js 0.10 has enumerable non-index properties on buffers. - (isBuff && (key == 'offset' || key == 'parent')) || - // PhantomJS 2 has enumerable non-index properties on typed arrays. - (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) || - // Skip index properties. - isIndex(key, length) - ))) { - result.push(key); + function _keyIterator(coll) { + var i = -1; + var len; + var keys; + if (_isArrayLike(coll)) { + len = coll.length; + return function next() { + i++; + return i < len ? i : null; + }; + } else { + keys = _keys(coll); + len = keys.length; + return function next() { + i++; + return i < len ? keys[i] : null; + }; + } } - } - return result; -} -/** Used for built-in method references. */ -var objectProto$7 = Object.prototype; - -/** - * Checks if `value` is likely a prototype object. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a prototype, else `false`. - */ -function isPrototype(value) { - var Ctor = value && value.constructor, - proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$7; + // Similar to ES6's rest param (http://ariya.ofilabs.com/2013/03/es6-and-rest-parameter.html) + // This accumulates the arguments passed into an array, after a given index. + // From underscore.js (https://github.com/jashkenas/underscore/pull/2140). + function _restParam(func, startIndex) { + startIndex = startIndex == null ? func.length - 1 : +startIndex; + return function() { + var length = Math.max(arguments.length - startIndex, 0); + var rest = Array(length); + for (var index = 0; index < length; index++) { + rest[index] = arguments[index + startIndex]; + } + switch (startIndex) { + case 0: return func.call(this, rest); + case 1: return func.call(this, arguments[0], rest); + } + // Currently unused but handle cases outside of the switch statement: + // var args = Array(startIndex + 1); + // for (index = 0; index < startIndex; index++) { + // args[index] = arguments[index]; + // } + // args[startIndex] = rest; + // return func.apply(this, args); + }; + } - return value === proto; -} + function _withoutIndex(iterator) { + return function (value, index, callback) { + return iterator(value, callback); + }; + } -/** - * Creates a unary function that invokes `func` with its argument transformed. - * - * @private - * @param {Function} func The function to wrap. - * @param {Function} transform The argument transform. - * @returns {Function} Returns the new function. - */ -function overArg(func, transform) { - return function(arg) { - return func(transform(arg)); - }; -} + //// exported async module functions //// -/* Built-in method references for those with the same name as other `lodash` methods. */ -var nativeKeys = overArg(Object.keys, Object); + //// nextTick implementation with browser-compatible fallback //// -/** Used for built-in method references. */ -var objectProto$6 = Object.prototype; + // capture the global reference to guard against fakeTimer mocks + var _setImmediate = typeof setImmediate === 'function' && setImmediate; -/** Used to check objects for own properties. */ -var hasOwnProperty$3 = objectProto$6.hasOwnProperty; + var _delay = _setImmediate ? function(fn) { + // not a direct alias for IE10 compatibility + _setImmediate(fn); + } : function(fn) { + setTimeout(fn, 0); + }; -/** - * The base implementation of `_.keys` which doesn't treat sparse arrays as dense. - * - * @private - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property names. - */ -function baseKeys(object) { - if (!isPrototype(object)) { - return nativeKeys(object); - } - var result = []; - for (var key in Object(object)) { - if (hasOwnProperty$3.call(object, key) && key != 'constructor') { - result.push(key); + if (typeof process === 'object' && typeof process.nextTick === 'function') { + async.nextTick = process.nextTick; + } else { + async.nextTick = _delay; } - } - return result; -} + async.setImmediate = _setImmediate ? _delay : async.nextTick; -/** - * Creates an array of the own enumerable property names of `object`. - * - * **Note:** Non-object values are coerced to objects. See the - * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys) - * for more details. - * - * @static - * @since 0.1.0 - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property names. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.keys(new Foo); - * // => ['a', 'b'] (iteration order is not guaranteed) - * - * _.keys('hi'); - * // => ['0', '1'] - */ -function keys(object) { - return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object); -} - -function createArrayIterator(coll) { - var i = -1; - var len = coll.length; - return function next() { - return ++i < len ? { value: coll[i], key: i } : null; - }; -} - -function createES2015Iterator(iterator) { - var i = -1; - return function next() { - var item = iterator.next(); - if (item.done) return null; - i++; - return { value: item.value, key: i }; - }; -} - -function createObjectIterator(obj) { - var okeys = keys(obj); - var i = -1; - var len = okeys.length; - return function next() { - var key = okeys[++i]; - return i < len ? { value: obj[key], key: key } : null; + + async.forEach = + async.each = function (arr, iterator, callback) { + return async.eachOf(arr, _withoutIndex(iterator), callback); }; -} -function iterator(coll) { - if (isArrayLike(coll)) { - return createArrayIterator(coll); - } + async.forEachSeries = + async.eachSeries = function (arr, iterator, callback) { + return async.eachOfSeries(arr, _withoutIndex(iterator), callback); + }; - var iterator = getIterator(coll); - return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll); -} -function onlyOnce(fn) { - return function () { - if (fn === null) throw new Error("Callback was already called."); - var callFn = fn; - fn = null; - callFn.apply(this, arguments); + async.forEachLimit = + async.eachLimit = function (arr, limit, iterator, callback) { + return _eachOfLimit(limit)(arr, _withoutIndex(iterator), callback); }; -} -// A temporary value used to identify if the loop should be broken. -// See #1064, #1293 -var breakLoop = {}; + async.forEachOf = + async.eachOf = function (object, iterator, callback) { + callback = _once(callback || noop); + object = object || []; -function _eachOfLimit(limit) { - return function (obj, iteratee, callback) { - callback = once(callback || noop); - if (limit <= 0 || !obj) { - return callback(null); + var iter = _keyIterator(object); + var key, completed = 0; + + while ((key = iter()) != null) { + completed += 1; + iterator(object[key], key, only_once(done)); } - var nextElem = iterator(obj); - var done = false; - var running = 0; - function iterateeCallback(err, value) { - running -= 1; + if (completed === 0) callback(null); + + function done(err) { + completed--; if (err) { - done = true; callback(err); - } else if (value === breakLoop || done && running <= 0) { - done = true; - return callback(null); - } else { - replenish(); + } + // Check key is null in case iterator isn't exhausted + // and done resolved synchronously. + else if (key === null && completed <= 0) { + callback(null); } } + }; - function replenish() { - while (running < limit && !done) { - var elem = nextElem(); - if (elem === null) { - done = true; - if (running <= 0) { - callback(null); + async.forEachOfSeries = + async.eachOfSeries = function (obj, iterator, callback) { + callback = _once(callback || noop); + obj = obj || []; + var nextKey = _keyIterator(obj); + var key = nextKey(); + function iterate() { + var sync = true; + if (key === null) { + return callback(null); + } + iterator(obj[key], key, only_once(function (err) { + if (err) { + callback(err); + } + else { + key = nextKey(); + if (key === null) { + return callback(null); + } else { + if (sync) { + async.setImmediate(iterate); + } else { + iterate(); + } } - return; } - running += 1; - iteratee(elem.value, elem.key, onlyOnce(iterateeCallback)); - } + })); + sync = false; } - - replenish(); - }; -} - -/** - * The same as [`eachOf`]{@link module:Collections.eachOf} but runs a maximum of `limit` async operations at a - * time. - * - * @name eachOfLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.eachOf]{@link module:Collections.eachOf} - * @alias forEachOfLimit - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A function to apply to each - * item in `coll`. The `key` is the item's key, or index in the case of an - * array. The iteratee is passed a `callback(err)` which must be called once it - * has completed. If no error has occurred, the callback should be run without - * arguments or with an explicit `null` argument. Invoked with - * (item, key, callback). - * @param {Function} [callback] - A callback which is called when all - * `iteratee` functions have finished, or an error occurs. Invoked with (err). - */ -function eachOfLimit(coll, limit, iteratee, callback) { - _eachOfLimit(limit)(coll, iteratee, callback); -} - -function doLimit(fn, limit) { - return function (iterable, iteratee, callback) { - return fn(iterable, limit, iteratee, callback); + iterate(); }; -} - -// eachOf implementation optimized for array-likes -function eachOfArrayLike(coll, iteratee, callback) { - callback = once(callback || noop); - var index = 0, - completed = 0, - length = coll.length; - if (length === 0) { - callback(null); - } - - function iteratorCallback(err) { - if (err) { - callback(err); - } else if (++completed === length) { - callback(null); - } - } - for (; index < length; index++) { - iteratee(coll[index], index, onlyOnce(iteratorCallback)); - } -} - -// a generic version of eachOf which can handle array, object, and iterator cases. -var eachOfGeneric = doLimit(eachOfLimit, Infinity); -/** - * Like [`each`]{@link module:Collections.each}, except that it passes the key (or index) as the second argument - * to the iteratee. - * - * @name eachOf - * @static - * @memberOf module:Collections - * @method - * @alias forEachOf - * @category Collection - * @see [async.each]{@link module:Collections.each} - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each - * item in `coll`. The `key` is the item's key, or index in the case of an - * array. The iteratee is passed a `callback(err)` which must be called once it - * has completed. If no error has occurred, the callback should be run without - * arguments or with an explicit `null` argument. Invoked with - * (item, key, callback). - * @param {Function} [callback] - A callback which is called when all - * `iteratee` functions have finished, or an error occurs. Invoked with (err). - * @example - * - * var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"}; - * var configs = {}; - * - * async.forEachOf(obj, function (value, key, callback) { - * fs.readFile(__dirname + value, "utf8", function (err, data) { - * if (err) return callback(err); - * try { - * configs[key] = JSON.parse(data); - * } catch (e) { - * return callback(e); - * } - * callback(); - * }); - * }, function (err) { - * if (err) console.error(err.message); - * // configs is now a map of JSON data - * doSomethingWith(configs); - * }); - */ -var eachOf = function (coll, iteratee, callback) { - var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric; - eachOfImplementation(coll, iteratee, callback); -}; - -function doParallel(fn) { - return function (obj, iteratee, callback) { - return fn(eachOf, obj, iteratee, callback); - }; -} - -function _asyncMap(eachfn, arr, iteratee, callback) { - callback = once(callback || noop); - arr = arr || []; - var results = []; - var counter = 0; - - eachfn(arr, function (value, _, callback) { - var index = counter++; - iteratee(value, function (err, v) { - results[index] = v; - callback(err); - }); - }, function (err) { - callback(err, results); - }); -} - -/** - * Produces a new collection of values by mapping each value in `coll` through - * the `iteratee` function. The `iteratee` is called with an item from `coll` - * and a callback for when it has finished processing. Each of these callback - * takes 2 arguments: an `error`, and the transformed item from `coll`. If - * `iteratee` passes an error to its callback, the main `callback` (for the - * `map` function) is immediately called with the error. - * - * Note, that since this function applies the `iteratee` to each item in - * parallel, there is no guarantee that the `iteratee` functions will complete - * in order. However, the results array will be in the same order as the - * original `coll`. - * - * If `map` is passed an Object, the results will be an Array. The results - * will roughly be in the order of the original Objects' keys (but this can - * vary across JavaScript engines) - * - * @name map - * @static - * @memberOf module:Collections - * @method - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, transformed)` which must be called - * once it has completed with an error (which can be `null`) and a - * transformed item. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. Results is an Array of the - * transformed items from the `coll`. Invoked with (err, results). - * @example - * - * async.map(['file1','file2','file3'], fs.stat, function(err, results) { - * // results is now an array of stats for each file - * }); - */ -var map = doParallel(_asyncMap); - -/** - * Applies the provided arguments to each function in the array, calling - * `callback` after all functions have completed. If you only provide the first - * argument, `fns`, then it will return a function which lets you pass in the - * arguments as if it were a single function call. If more arguments are - * provided, `callback` is required while `args` is still optional. - * - * @name applyEach - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Array|Iterable|Object} fns - A collection of asynchronous functions - * to all call with the same arguments - * @param {...*} [args] - any number of separate arguments to pass to the - * function. - * @param {Function} [callback] - the final argument should be the callback, - * called when all functions have completed processing. - * @returns {Function} - If only the first argument, `fns`, is provided, it will - * return a function which lets you pass in the arguments as if it were a single - * function call. The signature is `(..args, callback)`. If invoked with any - * arguments, `callback` is required. - * @example - * - * async.applyEach([enableSearch, updateSchema], 'bucket', callback); - * - * // partial application example: - * async.each( - * buckets, - * async.applyEach([enableSearch, updateSchema]), - * callback - * ); - */ -var applyEach = applyEach$1(map); -function doParallelLimit(fn) { - return function (obj, limit, iteratee, callback) { - return fn(_eachOfLimit(limit), obj, iteratee, callback); + async.forEachOfLimit = + async.eachOfLimit = function (obj, limit, iterator, callback) { + _eachOfLimit(limit)(obj, iterator, callback); }; -} - -/** - * The same as [`map`]{@link module:Collections.map} but runs a maximum of `limit` async operations at a time. - * - * @name mapLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.map]{@link module:Collections.map} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, transformed)` which must be called - * once it has completed with an error (which can be `null`) and a transformed - * item. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. Results is an array of the - * transformed items from the `coll`. Invoked with (err, results). - */ -var mapLimit = doParallelLimit(_asyncMap); - -/** - * The same as [`map`]{@link module:Collections.map} but runs only a single async operation at a time. - * - * @name mapSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.map]{@link module:Collections.map} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, transformed)` which must be called - * once it has completed with an error (which can be `null`) and a - * transformed item. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. Results is an array of the - * transformed items from the `coll`. Invoked with (err, results). - */ -var mapSeries = doLimit(mapLimit, 1); - -/** - * The same as [`applyEach`]{@link module:ControlFlow.applyEach} but runs only a single async operation at a time. - * - * @name applyEachSeries - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.applyEach]{@link module:ControlFlow.applyEach} - * @category Control Flow - * @param {Array|Iterable|Object} fns - A collection of asynchronous functions to all - * call with the same arguments - * @param {...*} [args] - any number of separate arguments to pass to the - * function. - * @param {Function} [callback] - the final argument should be the callback, - * called when all functions have completed processing. - * @returns {Function} - If only the first argument is provided, it will return - * a function which lets you pass in the arguments as if it were a single - * function call. - */ -var applyEachSeries = applyEach$1(mapSeries); - -/** - * Creates a continuation function with some arguments already applied. - * - * Useful as a shorthand when combined with other control flow functions. Any - * arguments passed to the returned function are added to the arguments - * originally passed to apply. - * - * @name apply - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} function - The function you want to eventually apply all - * arguments to. Invokes with (arguments...). - * @param {...*} arguments... - Any number of arguments to automatically apply - * when the continuation is called. - * @example - * - * // using apply - * async.parallel([ - * async.apply(fs.writeFile, 'testfile1', 'test1'), - * async.apply(fs.writeFile, 'testfile2', 'test2') - * ]); - * - * - * // the same process without using apply - * async.parallel([ - * function(callback) { - * fs.writeFile('testfile1', 'test1', callback); - * }, - * function(callback) { - * fs.writeFile('testfile2', 'test2', callback); - * } - * ]); - * - * // It's possible to pass any number of additional arguments when calling the - * // continuation: - * - * node> var fn = async.apply(sys.puts, 'one'); - * node> fn('two', 'three'); - * one - * two - * three - */ -var apply$2 = baseRest$1(function (fn, args) { - return baseRest$1(function (callArgs) { - return fn.apply(null, args.concat(callArgs)); - }); -}); - -/** - * Take a sync function and make it async, passing its return value to a - * callback. This is useful for plugging sync functions into a waterfall, - * series, or other async functions. Any arguments passed to the generated - * function will be passed to the wrapped function (except for the final - * callback argument). Errors thrown will be passed to the callback. - * - * If the function passed to `asyncify` returns a Promise, that promises's - * resolved/rejected state will be used to call the callback, rather than simply - * the synchronous return value. - * - * This also means you can asyncify ES2016 `async` functions. - * - * @name asyncify - * @static - * @memberOf module:Utils - * @method - * @alias wrapSync - * @category Util - * @param {Function} func - The synchronous function to convert to an - * asynchronous function. - * @returns {Function} An asynchronous wrapper of the `func`. To be invoked with - * (callback). - * @example - * - * // passing a regular synchronous function - * async.waterfall([ - * async.apply(fs.readFile, filename, "utf8"), - * async.asyncify(JSON.parse), - * function (data, next) { - * // data is the result of parsing the text. - * // If there was a parsing error, it would have been caught. - * } - * ], callback); - * - * // passing a function returning a promise - * async.waterfall([ - * async.apply(fs.readFile, filename, "utf8"), - * async.asyncify(function (contents) { - * return db.model.create(contents); - * }), - * function (model, next) { - * // `model` is the instantiated model object. - * // If there was an error, this function would be skipped. - * } - * ], callback); - * - * // es6 example - * var q = async.queue(async.asyncify(async function(file) { - * var intermediateStep = await processFile(file); - * return await somePromise(intermediateStep) - * })); - * - * q.push(files); - */ -function asyncify(func) { - return initialParams(function (args, callback) { - var result; - try { - result = func.apply(this, args); - } catch (e) { - return callback(e); - } - // if result is Promise object - if (isObject(result) && typeof result.then === 'function') { - result.then(function (value) { - callback(null, value); - }, function (err) { - callback(err.message ? err : new Error(err)); - }); - } else { - callback(null, result); - } - }); -} -/** - * A specialized version of `_.forEach` for arrays without support for - * iteratee shorthands. - * - * @private - * @param {Array} [array] The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns `array`. - */ -function arrayEach(array, iteratee) { - var index = -1, - length = array ? array.length : 0; - - while (++index < length) { - if (iteratee(array[index], index, array) === false) { - break; - } - } - return array; -} + function _eachOfLimit(limit) { -/** - * Creates a base function for methods like `_.forIn` and `_.forOwn`. - * - * @private - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new base function. - */ -function createBaseFor(fromRight) { - return function(object, iteratee, keysFunc) { - var index = -1, - iterable = Object(object), - props = keysFunc(object), - length = props.length; - - while (length--) { - var key = props[fromRight ? length : ++index]; - if (iteratee(iterable[key], key, iterable) === false) { - break; - } - } - return object; - }; -} - -/** - * The base implementation of `baseForOwn` which iterates over `object` - * properties returned by `keysFunc` and invokes `iteratee` for each property. - * Iteratee functions may exit iteration early by explicitly returning `false`. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {Function} keysFunc The function to get the keys of `object`. - * @returns {Object} Returns `object`. - */ -var baseFor = createBaseFor(); - -/** - * The base implementation of `_.forOwn` without support for iteratee shorthands. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Object} Returns `object`. - */ -function baseForOwn(object, iteratee) { - return object && baseFor(object, iteratee, keys); -} + return function (obj, iterator, callback) { + callback = _once(callback || noop); + obj = obj || []; + var nextKey = _keyIterator(obj); + if (limit <= 0) { + return callback(null); + } + var done = false; + var running = 0; + var errored = false; -/** - * The base implementation of `_.findIndex` and `_.findLastIndex` without - * support for iteratee shorthands. - * - * @private - * @param {Array} array The array to inspect. - * @param {Function} predicate The function invoked per iteration. - * @param {number} fromIndex The index to search from. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {number} Returns the index of the matched value, else `-1`. - */ -function baseFindIndex(array, predicate, fromIndex, fromRight) { - var length = array.length, - index = fromIndex + (fromRight ? 1 : -1); + (function replenish () { + if (done && running <= 0) { + return callback(null); + } - while ((fromRight ? index-- : ++index < length)) { - if (predicate(array[index], index, array)) { - return index; + while (running < limit && !errored) { + var key = nextKey(); + if (key === null) { + done = true; + if (running <= 0) { + callback(null); + } + return; + } + running += 1; + iterator(obj[key], key, only_once(function (err) { + running -= 1; + if (err) { + callback(err); + errored = true; + } + else { + replenish(); + } + })); + } + })(); + }; } - } - return -1; -} - -/** - * The base implementation of `_.isNaN` without support for number objects. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. - */ -function baseIsNaN(value) { - return value !== value; -} -/** - * A specialized version of `_.indexOf` which performs strict equality - * comparisons of values, i.e. `===`. - * - * @private - * @param {Array} array The array to inspect. - * @param {*} value The value to search for. - * @param {number} fromIndex The index to search from. - * @returns {number} Returns the index of the matched value, else `-1`. - */ -function strictIndexOf(array, value, fromIndex) { - var index = fromIndex - 1, - length = array.length; - while (++index < length) { - if (array[index] === value) { - return index; + function doParallel(fn) { + return function (obj, iterator, callback) { + return fn(async.eachOf, obj, iterator, callback); + }; } - } - return -1; -} - -/** - * The base implementation of `_.indexOf` without `fromIndex` bounds checks. - * - * @private - * @param {Array} array The array to inspect. - * @param {*} value The value to search for. - * @param {number} fromIndex The index to search from. - * @returns {number} Returns the index of the matched value, else `-1`. - */ -function baseIndexOf(array, value, fromIndex) { - return value === value - ? strictIndexOf(array, value, fromIndex) - : baseFindIndex(array, baseIsNaN, fromIndex); -} - -/** - * Determines the best order for running the functions in `tasks`, based on - * their requirements. Each function can optionally depend on other functions - * being completed first, and each function is run as soon as its requirements - * are satisfied. - * - * If any of the functions pass an error to their callback, the `auto` sequence - * will stop. Further tasks will not execute (so any other functions depending - * on it will not run), and the main `callback` is immediately called with the - * error. - * - * Functions also receive an object containing the results of functions which - * have completed so far as the first argument, if they have dependencies. If a - * task function has no dependencies, it will only be passed a callback. - * - * @name auto - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Object} tasks - An object. Each of its properties is either a - * function or an array of requirements, with the function itself the last item - * in the array. The object's key of a property serves as the name of the task - * defined by that property, i.e. can be used when specifying requirements for - * other tasks. The function receives one or two arguments: - * * a `results` object, containing the results of the previously executed - * functions, only passed if the task has any dependencies, - * * a `callback(err, result)` function, which must be called when finished, - * passing an `error` (which can be `null`) and the result of the function's - * execution. - * @param {number} [concurrency=Infinity] - An optional `integer` for - * determining the maximum number of tasks that can be run in parallel. By - * default, as many as possible. - * @param {Function} [callback] - An optional callback which is called when all - * the tasks have been completed. It receives the `err` argument if any `tasks` - * pass an error to their callback. Results are always returned; however, if an - * error occurs, no further `tasks` will be performed, and the results object - * will only contain partial results. Invoked with (err, results). - * @returns undefined - * @example - * - * async.auto({ - * // this function will just be passed a callback - * readData: async.apply(fs.readFile, 'data.txt', 'utf-8'), - * showData: ['readData', function(results, cb) { - * // results.readData is the file's contents - * // ... - * }] - * }, callback); - * - * async.auto({ - * get_data: function(callback) { - * console.log('in get_data'); - * // async code to get some data - * callback(null, 'data', 'converted to array'); - * }, - * make_folder: function(callback) { - * console.log('in make_folder'); - * // async code to create a directory to store a file in - * // this is run at the same time as getting the data - * callback(null, 'folder'); - * }, - * write_file: ['get_data', 'make_folder', function(results, callback) { - * console.log('in write_file', JSON.stringify(results)); - * // once there is some data and the directory exists, - * // write the data to a file in the directory - * callback(null, 'filename'); - * }], - * email_link: ['write_file', function(results, callback) { - * console.log('in email_link', JSON.stringify(results)); - * // once the file is written let's email a link to it... - * // results.write_file contains the filename returned by write_file. - * callback(null, {'file':results.write_file, 'email':'user@example.com'}); - * }] - * }, function(err, results) { - * console.log('err = ', err); - * console.log('results = ', results); - * }); - */ -var auto = function (tasks, concurrency, callback) { - if (typeof concurrency === 'function') { - // concurrency is optional, shift the args. - callback = concurrency; - concurrency = null; - } - callback = once(callback || noop); - var keys$$1 = keys(tasks); - var numTasks = keys$$1.length; - if (!numTasks) { - return callback(null); + function doParallelLimit(fn) { + return function (obj, limit, iterator, callback) { + return fn(_eachOfLimit(limit), obj, iterator, callback); + }; } - if (!concurrency) { - concurrency = numTasks; + function doSeries(fn) { + return function (obj, iterator, callback) { + return fn(async.eachOfSeries, obj, iterator, callback); + }; } - var results = {}; - var runningTasks = 0; - var hasError = false; - - var listeners = {}; + function _asyncMap(eachfn, arr, iterator, callback) { + callback = _once(callback || noop); + arr = arr || []; + var results = _isArrayLike(arr) ? [] : {}; + eachfn(arr, function (value, index, callback) { + iterator(value, function (err, v) { + results[index] = v; + callback(err); + }); + }, function (err) { + callback(err, results); + }); + } - var readyTasks = []; + async.map = doParallel(_asyncMap); + async.mapSeries = doSeries(_asyncMap); + async.mapLimit = doParallelLimit(_asyncMap); + + // reduce only has a series version, as doing reduce in parallel won't + // work in many situations. + async.inject = + async.foldl = + async.reduce = function (arr, memo, iterator, callback) { + async.eachOfSeries(arr, function (x, i, callback) { + iterator(memo, x, function (err, v) { + memo = v; + callback(err); + }); + }, function (err) { + callback(err, memo); + }); + }; - // for cycle detection: - var readyToCheck = []; // tasks that have been identified as reachable - // without the possibility of returning to an ancestor task - var uncheckedDependencies = {}; + async.foldr = + async.reduceRight = function (arr, memo, iterator, callback) { + var reversed = _map(arr, identity).reverse(); + async.reduce(reversed, memo, iterator, callback); + }; - baseForOwn(tasks, function (task, key) { - if (!isArray(task)) { - // no dependencies - enqueueTask(key, [task]); - readyToCheck.push(key); - return; + async.transform = function (arr, memo, iterator, callback) { + if (arguments.length === 3) { + callback = iterator; + iterator = memo; + memo = _isArray(arr) ? [] : {}; } - var dependencies = task.slice(0, task.length - 1); - var remainingDependencies = dependencies.length; - if (remainingDependencies === 0) { - enqueueTask(key, task); - readyToCheck.push(key); - return; - } - uncheckedDependencies[key] = remainingDependencies; + async.eachOf(arr, function(v, k, cb) { + iterator(memo, v, k, cb); + }, function(err) { + callback(err, memo); + }); + }; - arrayEach(dependencies, function (dependencyName) { - if (!tasks[dependencyName]) { - throw new Error('async.auto task `' + key + '` has a non-existent dependency in ' + dependencies.join(', ')); - } - addListener(dependencyName, function () { - remainingDependencies--; - if (remainingDependencies === 0) { - enqueueTask(key, task); + function _filter(eachfn, arr, iterator, callback) { + var results = []; + eachfn(arr, function (x, index, callback) { + iterator(x, function (v) { + if (v) { + results.push({index: index, value: x}); } + callback(); }); - }); - }); - - checkForDeadlocks(); - processQueue(); - - function enqueueTask(key, task) { - readyTasks.push(function () { - runTask(key, task); + }, function () { + callback(_map(results.sort(function (a, b) { + return a.index - b.index; + }), function (x) { + return x.value; + })); }); } - function processQueue() { - if (readyTasks.length === 0 && runningTasks === 0) { - return callback(null, results); - } - while (readyTasks.length && runningTasks < concurrency) { - var run = readyTasks.shift(); - run(); - } - } + async.select = + async.filter = doParallel(_filter); - function addListener(taskName, fn) { - var taskListeners = listeners[taskName]; - if (!taskListeners) { - taskListeners = listeners[taskName] = []; - } + async.selectLimit = + async.filterLimit = doParallelLimit(_filter); - taskListeners.push(fn); - } + async.selectSeries = + async.filterSeries = doSeries(_filter); - function taskComplete(taskName) { - var taskListeners = listeners[taskName] || []; - arrayEach(taskListeners, function (fn) { - fn(); - }); - processQueue(); + function _reject(eachfn, arr, iterator, callback) { + _filter(eachfn, arr, function(value, cb) { + iterator(value, function(v) { + cb(!v); + }); + }, callback); } - - function runTask(key, task) { - if (hasError) return; - - var taskCallback = onlyOnce(baseRest$1(function (err, args) { - runningTasks--; - if (args.length <= 1) { - args = args[0]; + async.reject = doParallel(_reject); + async.rejectLimit = doParallelLimit(_reject); + async.rejectSeries = doSeries(_reject); + + function _createTester(eachfn, check, getResult) { + return function(arr, limit, iterator, cb) { + function done() { + if (cb) cb(getResult(false, void 0)); } - if (err) { - var safeResults = {}; - baseForOwn(results, function (val, rkey) { - safeResults[rkey] = val; + function iteratee(x, _, callback) { + if (!cb) return callback(); + iterator(x, function (v) { + if (cb && check(v)) { + cb(getResult(true, x)); + cb = iterator = false; + } + callback(); }); - safeResults[key] = args; - hasError = true; - listeners = []; - - callback(err, safeResults); - } else { - results[key] = args; - taskComplete(key); } - })); - - runningTasks++; - var taskFn = task[task.length - 1]; - if (task.length > 1) { - taskFn(results, taskCallback); - } else { - taskFn(taskCallback); - } - } - - function checkForDeadlocks() { - // Kahn's algorithm - // https://en.wikipedia.org/wiki/Topological_sorting#Kahn.27s_algorithm - // http://connalle.blogspot.com/2013/10/topological-sortingkahn-algorithm.html - var currentTask; - var counter = 0; - while (readyToCheck.length) { - currentTask = readyToCheck.pop(); - counter++; - arrayEach(getDependents(currentTask), function (dependent) { - if (--uncheckedDependencies[dependent] === 0) { - readyToCheck.push(dependent); - } - }); - } - - if (counter !== numTasks) { - throw new Error('async.auto cannot execute tasks due to a recursive dependency'); - } - } - - function getDependents(taskName) { - var result = []; - baseForOwn(tasks, function (task, key) { - if (isArray(task) && baseIndexOf(task, taskName, 0) >= 0) { - result.push(key); + if (arguments.length > 3) { + eachfn(arr, limit, iteratee, done); + } else { + cb = iterator; + iterator = limit; + eachfn(arr, iteratee, done); } - }); - return result; + }; } -}; - -/** - * A specialized version of `_.map` for arrays without support for iteratee - * shorthands. - * - * @private - * @param {Array} [array] The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns the new mapped array. - */ -function arrayMap(array, iteratee) { - var index = -1, - length = array ? array.length : 0, - result = Array(length); - - while (++index < length) { - result[index] = iteratee(array[index], index, array); - } - return result; -} - -/** - * Copies the values of `source` to `array`. - * - * @private - * @param {Array} source The array to copy values from. - * @param {Array} [array=[]] The array to copy values to. - * @returns {Array} Returns `array`. - */ -function copyArray(source, array) { - var index = -1, - length = source.length; - - array || (array = Array(length)); - while (++index < length) { - array[index] = source[index]; - } - return array; -} - -/** Built-in value references. */ -var Symbol$1 = root.Symbol; - -/** `Object#toString` result references. */ -var symbolTag = '[object Symbol]'; - -/** Used for built-in method references. */ -var objectProto$8 = Object.prototype; - -/** - * Used to resolve the - * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) - * of values. - */ -var objectToString$3 = objectProto$8.toString; - -/** - * Checks if `value` is classified as a `Symbol` primitive or object. - * - * @static - * @memberOf _ - * @since 4.0.0 - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a symbol, else `false`. - * @example - * - * _.isSymbol(Symbol.iterator); - * // => true - * - * _.isSymbol('abc'); - * // => false - */ -function isSymbol(value) { - return typeof value == 'symbol' || - (isObjectLike(value) && objectToString$3.call(value) == symbolTag); -} - -/** Used as references for various `Number` constants. */ -var INFINITY = 1 / 0; - -/** Used to convert symbols to primitives and strings. */ -var symbolProto = Symbol$1 ? Symbol$1.prototype : undefined; -var symbolToString = symbolProto ? symbolProto.toString : undefined; - -/** - * The base implementation of `_.toString` which doesn't convert nullish - * values to empty strings. - * - * @private - * @param {*} value The value to process. - * @returns {string} Returns the string. - */ -function baseToString(value) { - // Exit early for strings to avoid a performance hit in some environments. - if (typeof value == 'string') { - return value; - } - if (isArray(value)) { - // Recursively convert values (susceptible to call stack limits). - return arrayMap(value, baseToString) + ''; - } - if (isSymbol(value)) { - return symbolToString ? symbolToString.call(value) : ''; - } - var result = (value + ''); - return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; -} - -/** - * The base implementation of `_.slice` without an iteratee call guard. - * - * @private - * @param {Array} array The array to slice. - * @param {number} [start=0] The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns the slice of `array`. - */ -function baseSlice(array, start, end) { - var index = -1, - length = array.length; - - if (start < 0) { - start = -start > length ? 0 : (length + start); - } - end = end > length ? length : end; - if (end < 0) { - end += length; - } - length = start > end ? 0 : ((end - start) >>> 0); - start >>>= 0; - - var result = Array(length); - while (++index < length) { - result[index] = array[index + start]; - } - return result; -} - -/** - * Casts `array` to a slice if it's needed. - * - * @private - * @param {Array} array The array to inspect. - * @param {number} start The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns the cast slice. - */ -function castSlice(array, start, end) { - var length = array.length; - end = end === undefined ? length : end; - return (!start && end >= length) ? array : baseSlice(array, start, end); -} - -/** - * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol - * that is not found in the character symbols. - * - * @private - * @param {Array} strSymbols The string symbols to inspect. - * @param {Array} chrSymbols The character symbols to find. - * @returns {number} Returns the index of the last unmatched string symbol. - */ -function charsEndIndex(strSymbols, chrSymbols) { - var index = strSymbols.length; - - while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} - return index; -} -/** - * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol - * that is not found in the character symbols. - * - * @private - * @param {Array} strSymbols The string symbols to inspect. - * @param {Array} chrSymbols The character symbols to find. - * @returns {number} Returns the index of the first unmatched string symbol. - */ -function charsStartIndex(strSymbols, chrSymbols) { - var index = -1, - length = strSymbols.length; - - while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} - return index; -} - -/** - * Converts an ASCII `string` to an array. - * - * @private - * @param {string} string The string to convert. - * @returns {Array} Returns the converted array. - */ -function asciiToArray(string) { - return string.split(''); -} + async.any = + async.some = _createTester(async.eachOf, toBool, identity); -/** Used to compose unicode character classes. */ -var rsAstralRange = '\\ud800-\\udfff'; -var rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23'; -var rsComboSymbolsRange = '\\u20d0-\\u20f0'; -var rsVarRange = '\\ufe0e\\ufe0f'; + async.someLimit = _createTester(async.eachOfLimit, toBool, identity); -/** Used to compose unicode capture groups. */ -var rsZWJ = '\\u200d'; + async.all = + async.every = _createTester(async.eachOf, notId, notId); -/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */ -var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']'); + async.everyLimit = _createTester(async.eachOfLimit, notId, notId); -/** - * Checks if `string` contains Unicode symbols. - * - * @private - * @param {string} string The string to inspect. - * @returns {boolean} Returns `true` if a symbol is found, else `false`. - */ -function hasUnicode(string) { - return reHasUnicode.test(string); -} - -/** Used to compose unicode character classes. */ -var rsAstralRange$1 = '\\ud800-\\udfff'; -var rsComboMarksRange$1 = '\\u0300-\\u036f\\ufe20-\\ufe23'; -var rsComboSymbolsRange$1 = '\\u20d0-\\u20f0'; -var rsVarRange$1 = '\\ufe0e\\ufe0f'; - -/** Used to compose unicode capture groups. */ -var rsAstral = '[' + rsAstralRange$1 + ']'; -var rsCombo = '[' + rsComboMarksRange$1 + rsComboSymbolsRange$1 + ']'; -var rsFitz = '\\ud83c[\\udffb-\\udfff]'; -var rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')'; -var rsNonAstral = '[^' + rsAstralRange$1 + ']'; -var rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}'; -var rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]'; -var rsZWJ$1 = '\\u200d'; - -/** Used to compose unicode regexes. */ -var reOptMod = rsModifier + '?'; -var rsOptVar = '[' + rsVarRange$1 + ']?'; -var rsOptJoin = '(?:' + rsZWJ$1 + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*'; -var rsSeq = rsOptVar + reOptMod + rsOptJoin; -var rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')'; - -/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */ -var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g'); - -/** - * Converts a Unicode `string` to an array. - * - * @private - * @param {string} string The string to convert. - * @returns {Array} Returns the converted array. - */ -function unicodeToArray(string) { - return string.match(reUnicode) || []; -} - -/** - * Converts `string` to an array. - * - * @private - * @param {string} string The string to convert. - * @returns {Array} Returns the converted array. - */ -function stringToArray(string) { - return hasUnicode(string) - ? unicodeToArray(string) - : asciiToArray(string); -} - -/** - * Converts `value` to a string. An empty string is returned for `null` - * and `undefined` values. The sign of `-0` is preserved. - * - * @static - * @memberOf _ - * @since 4.0.0 - * @category Lang - * @param {*} value The value to convert. - * @returns {string} Returns the converted string. - * @example - * - * _.toString(null); - * // => '' - * - * _.toString(-0); - * // => '-0' - * - * _.toString([1, 2, 3]); - * // => '1,2,3' - */ -function toString(value) { - return value == null ? '' : baseToString(value); -} - -/** Used to match leading and trailing whitespace. */ -var reTrim = /^\s+|\s+$/g; - -/** - * Removes leading and trailing whitespace or specified characters from `string`. - * - * @static - * @memberOf _ - * @since 3.0.0 - * @category String - * @param {string} [string=''] The string to trim. - * @param {string} [chars=whitespace] The characters to trim. - * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. - * @returns {string} Returns the trimmed string. - * @example - * - * _.trim(' abc '); - * // => 'abc' - * - * _.trim('-_-abc-_-', '_-'); - * // => 'abc' - * - * _.map([' foo ', ' bar '], _.trim); - * // => ['foo', 'bar'] - */ -function trim(string, chars, guard) { - string = toString(string); - if (string && (guard || chars === undefined)) { - return string.replace(reTrim, ''); - } - if (!string || !(chars = baseToString(chars))) { - return string; - } - var strSymbols = stringToArray(string), - chrSymbols = stringToArray(chars), - start = charsStartIndex(strSymbols, chrSymbols), - end = charsEndIndex(strSymbols, chrSymbols) + 1; - - return castSlice(strSymbols, start, end).join(''); -} - -var FN_ARGS = /^(function)?\s*[^\(]*\(\s*([^\)]*)\)/m; -var FN_ARG_SPLIT = /,/; -var FN_ARG = /(=.+)?(\s*)$/; -var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg; - -function parseParams(func) { - func = func.toString().replace(STRIP_COMMENTS, ''); - func = func.match(FN_ARGS)[2].replace(' ', ''); - func = func ? func.split(FN_ARG_SPLIT) : []; - func = func.map(function (arg) { - return trim(arg.replace(FN_ARG, '')); - }); - return func; -} - -/** - * A dependency-injected version of the [async.auto]{@link module:ControlFlow.auto} function. Dependent - * tasks are specified as parameters to the function, after the usual callback - * parameter, with the parameter names matching the names of the tasks it - * depends on. This can provide even more readable task graphs which can be - * easier to maintain. - * - * If a final callback is specified, the task results are similarly injected, - * specified as named parameters after the initial error parameter. - * - * The autoInject function is purely syntactic sugar and its semantics are - * otherwise equivalent to [async.auto]{@link module:ControlFlow.auto}. - * - * @name autoInject - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.auto]{@link module:ControlFlow.auto} - * @category Control Flow - * @param {Object} tasks - An object, each of whose properties is a function of - * the form 'func([dependencies...], callback). The object's key of a property - * serves as the name of the task defined by that property, i.e. can be used - * when specifying requirements for other tasks. - * * The `callback` parameter is a `callback(err, result)` which must be called - * when finished, passing an `error` (which can be `null`) and the result of - * the function's execution. The remaining parameters name other tasks on - * which the task is dependent, and the results from those tasks are the - * arguments of those parameters. - * @param {Function} [callback] - An optional callback which is called when all - * the tasks have been completed. It receives the `err` argument if any `tasks` - * pass an error to their callback, and a `results` object with any completed - * task results, similar to `auto`. - * @example - * - * // The example from `auto` can be rewritten as follows: - * async.autoInject({ - * get_data: function(callback) { - * // async code to get some data - * callback(null, 'data', 'converted to array'); - * }, - * make_folder: function(callback) { - * // async code to create a directory to store a file in - * // this is run at the same time as getting the data - * callback(null, 'folder'); - * }, - * write_file: function(get_data, make_folder, callback) { - * // once there is some data and the directory exists, - * // write the data to a file in the directory - * callback(null, 'filename'); - * }, - * email_link: function(write_file, callback) { - * // once the file is written let's email a link to it... - * // write_file contains the filename returned by write_file. - * callback(null, {'file':write_file, 'email':'user@example.com'}); - * } - * }, function(err, results) { - * console.log('err = ', err); - * console.log('email_link = ', results.email_link); - * }); - * - * // If you are using a JS minifier that mangles parameter names, `autoInject` - * // will not work with plain functions, since the parameter names will be - * // collapsed to a single letter identifier. To work around this, you can - * // explicitly specify the names of the parameters your task function needs - * // in an array, similar to Angular.js dependency injection. - * - * // This still has an advantage over plain `auto`, since the results a task - * // depends on are still spread into arguments. - * async.autoInject({ - * //... - * write_file: ['get_data', 'make_folder', function(get_data, make_folder, callback) { - * callback(null, 'filename'); - * }], - * email_link: ['write_file', function(write_file, callback) { - * callback(null, {'file':write_file, 'email':'user@example.com'}); - * }] - * //... - * }, function(err, results) { - * console.log('err = ', err); - * console.log('email_link = ', results.email_link); - * }); - */ -function autoInject(tasks, callback) { - var newTasks = {}; - - baseForOwn(tasks, function (taskFn, key) { - var params; - - if (isArray(taskFn)) { - params = copyArray(taskFn); - taskFn = params.pop(); + function _findGetResult(v, x) { + return x; + } + async.detect = _createTester(async.eachOf, identity, _findGetResult); + async.detectSeries = _createTester(async.eachOfSeries, identity, _findGetResult); + async.detectLimit = _createTester(async.eachOfLimit, identity, _findGetResult); - newTasks[key] = params.concat(params.length > 0 ? newTask : taskFn); - } else if (taskFn.length === 1) { - // no dependencies, use the function as-is - newTasks[key] = taskFn; - } else { - params = parseParams(taskFn); - if (taskFn.length === 0 && params.length === 0) { - throw new Error("autoInject task functions require explicit parameters."); + async.sortBy = function (arr, iterator, callback) { + async.map(arr, function (x, callback) { + iterator(x, function (err, criteria) { + if (err) { + callback(err); + } + else { + callback(null, {value: x, criteria: criteria}); + } + }); + }, function (err, results) { + if (err) { + return callback(err); + } + else { + callback(null, _map(results.sort(comparator), function (x) { + return x.value; + })); } - params.pop(); + }); - newTasks[key] = params.concat(newTask); + function comparator(left, right) { + var a = left.criteria, b = right.criteria; + return a < b ? -1 : a > b ? 1 : 0; } + }; - function newTask(results, taskCb) { - var newArgs = arrayMap(params, function (name) { - return results[name]; - }); - newArgs.push(taskCb); - taskFn.apply(null, newArgs); + async.auto = function (tasks, concurrency, callback) { + if (typeof arguments[1] === 'function') { + // concurrency is optional, shift the args. + callback = concurrency; + concurrency = null; + } + callback = _once(callback || noop); + var keys = _keys(tasks); + var remainingTasks = keys.length; + if (!remainingTasks) { + return callback(null); + } + if (!concurrency) { + concurrency = remainingTasks; } - }); - - auto(newTasks, callback); -} - -var hasSetImmediate = typeof setImmediate === 'function' && setImmediate; -var hasNextTick = typeof process === 'object' && typeof process.nextTick === 'function'; -function fallback(fn) { - setTimeout(fn, 0); -} + var results = {}; + var runningTasks = 0; -function wrap(defer) { - return baseRest$1(function (fn, args) { - defer(function () { - fn.apply(null, args); - }); - }); -} - -var _defer; - -if (hasSetImmediate) { - _defer = setImmediate; -} else if (hasNextTick) { - _defer = process.nextTick; -} else { - _defer = fallback; -} - -var setImmediate$1 = wrap(_defer); - -// Simple doubly linked list (https://en.wikipedia.org/wiki/Doubly_linked_list) implementation -// used for queues. This implementation assumes that the node provided by the user can be modified -// to adjust the next and last properties. We implement only the minimal functionality -// for queue support. -function DLL() { - this.head = this.tail = null; - this.length = 0; -} - -function setInitial(dll, node) { - dll.length = 1; - dll.head = dll.tail = node; -} - -DLL.prototype.removeLink = function (node) { - if (node.prev) node.prev.next = node.next;else this.head = node.next; - if (node.next) node.next.prev = node.prev;else this.tail = node.prev; - - node.prev = node.next = null; - this.length -= 1; - return node; -}; - -DLL.prototype.empty = DLL; - -DLL.prototype.insertAfter = function (node, newNode) { - newNode.prev = node; - newNode.next = node.next; - if (node.next) node.next.prev = newNode;else this.tail = newNode; - node.next = newNode; - this.length += 1; -}; - -DLL.prototype.insertBefore = function (node, newNode) { - newNode.prev = node.prev; - newNode.next = node; - if (node.prev) node.prev.next = newNode;else this.head = newNode; - node.prev = newNode; - this.length += 1; -}; - -DLL.prototype.unshift = function (node) { - if (this.head) this.insertBefore(this.head, node);else setInitial(this, node); -}; - -DLL.prototype.push = function (node) { - if (this.tail) this.insertAfter(this.tail, node);else setInitial(this, node); -}; - -DLL.prototype.shift = function () { - return this.head && this.removeLink(this.head); -}; - -DLL.prototype.pop = function () { - return this.tail && this.removeLink(this.tail); -}; - -function queue(worker, concurrency, payload) { - if (concurrency == null) { - concurrency = 1; - } else if (concurrency === 0) { - throw new Error('Concurrency must not be zero'); - } + var hasError = false; - function _insert(data, insertAtFront, callback) { - if (callback != null && typeof callback !== 'function') { - throw new Error('task callback must be a function'); + var listeners = []; + function addListener(fn) { + listeners.unshift(fn); } - q.started = true; - if (!isArray(data)) { - data = [data]; + function removeListener(fn) { + var idx = _indexOf(listeners, fn); + if (idx >= 0) listeners.splice(idx, 1); } - if (data.length === 0 && q.idle()) { - // call drain immediately if there are no tasks - return setImmediate$1(function () { - q.drain(); + function taskComplete() { + remainingTasks--; + _arrayEach(listeners.slice(0), function (fn) { + fn(); }); } - for (var i = 0, l = data.length; i < l; i++) { - var item = { - data: data[i], - callback: callback || noop - }; - - if (insertAtFront) { - q._tasks.unshift(item); - } else { - q._tasks.push(item); + addListener(function () { + if (!remainingTasks) { + callback(null, results); } - } - setImmediate$1(q.process); - } - - function _next(tasks) { - return baseRest$1(function (args) { - workers -= 1; + }); - for (var i = 0, l = tasks.length; i < l; i++) { - var task = tasks[i]; - var index = baseIndexOf(workersList, task, 0); - if (index >= 0) { - workersList.splice(index); + _arrayEach(keys, function (k) { + if (hasError) return; + var task = _isArray(tasks[k]) ? tasks[k]: [tasks[k]]; + var taskCallback = _restParam(function(err, args) { + runningTasks--; + if (args.length <= 1) { + args = args[0]; } + if (err) { + var safeResults = {}; + _forEachOf(results, function(val, rkey) { + safeResults[rkey] = val; + }); + safeResults[k] = args; + hasError = true; - task.callback.apply(task, args); - - if (args[0] != null) { - q.error(args[0], task.data); + callback(err, safeResults); } - } - - if (workers <= q.concurrency - q.buffer) { - q.unsaturated(); - } - - if (q.idle()) { - q.drain(); - } - q.process(); - }); - } - - var workers = 0; - var workersList = []; - var q = { - _tasks: new DLL(), - concurrency: concurrency, - payload: payload, - saturated: noop, - unsaturated: noop, - buffer: concurrency / 4, - empty: noop, - drain: noop, - error: noop, - started: false, - paused: false, - push: function (data, callback) { - _insert(data, false, callback); - }, - kill: function () { - q.drain = noop; - q._tasks.empty(); - }, - unshift: function (data, callback) { - _insert(data, true, callback); - }, - process: function () { - while (!q.paused && workers < q.concurrency && q._tasks.length) { - var tasks = [], - data = []; - var l = q._tasks.length; - if (q.payload) l = Math.min(l, q.payload); - for (var i = 0; i < l; i++) { - var node = q._tasks.shift(); - tasks.push(node); - data.push(node.data); + else { + results[k] = args; + async.setImmediate(taskComplete); } - - if (q._tasks.length === 0) { - q.empty(); + }); + var requires = task.slice(0, task.length - 1); + // prevent dead-locks + var len = requires.length; + var dep; + while (len--) { + if (!(dep = tasks[requires[len]])) { + throw new Error('Has nonexistent dependency in ' + requires.join(', ')); } - workers += 1; - workersList.push(tasks[0]); - - if (workers === q.concurrency) { - q.saturated(); + if (_isArray(dep) && _indexOf(dep, k) >= 0) { + throw new Error('Has cyclic dependencies'); } - - var cb = onlyOnce(_next(tasks)); - worker(data, cb); } - }, - length: function () { - return q._tasks.length; - }, - running: function () { - return workers; - }, - workersList: function () { - return workersList; - }, - idle: function () { - return q._tasks.length + workers === 0; - }, - pause: function () { - q.paused = true; - }, - resume: function () { - if (q.paused === false) { - return; + function ready() { + return runningTasks < concurrency && _reduce(requires, function (a, x) { + return (a && results.hasOwnProperty(x)); + }, true) && !results.hasOwnProperty(k); } - q.paused = false; - var resumeCount = Math.min(q.concurrency, q._tasks.length); - // Need to call q.process once per concurrent - // worker to preserve full concurrency after pause - for (var w = 1; w <= resumeCount; w++) { - setImmediate$1(q.process); + if (ready()) { + runningTasks++; + task[task.length - 1](taskCallback, results); } - } + else { + addListener(listener); + } + function listener() { + if (ready()) { + runningTasks++; + removeListener(listener); + task[task.length - 1](taskCallback, results); + } + } + }); }; - return q; -} - -/** - * A cargo of tasks for the worker function to complete. Cargo inherits all of - * the same methods and event callbacks as [`queue`]{@link module:ControlFlow.queue}. - * @typedef {Object} CargoObject - * @memberOf module:ControlFlow - * @property {Function} length - A function returning the number of items - * waiting to be processed. Invoke like `cargo.length()`. - * @property {number} payload - An `integer` for determining how many tasks - * should be process per round. This property can be changed after a `cargo` is - * created to alter the payload on-the-fly. - * @property {Function} push - Adds `task` to the `queue`. The callback is - * called once the `worker` has finished processing the task. Instead of a - * single task, an array of `tasks` can be submitted. The respective callback is - * used for every task in the list. Invoke like `cargo.push(task, [callback])`. - * @property {Function} saturated - A callback that is called when the - * `queue.length()` hits the concurrency and further tasks will be queued. - * @property {Function} empty - A callback that is called when the last item - * from the `queue` is given to a `worker`. - * @property {Function} drain - A callback that is called when the last item - * from the `queue` has returned from the `worker`. - * @property {Function} idle - a function returning false if there are items - * waiting or being processed, or true if not. Invoke like `cargo.idle()`. - * @property {Function} pause - a function that pauses the processing of tasks - * until `resume()` is called. Invoke like `cargo.pause()`. - * @property {Function} resume - a function that resumes the processing of - * queued tasks when the queue is paused. Invoke like `cargo.resume()`. - * @property {Function} kill - a function that removes the `drain` callback and - * empties remaining tasks from the queue forcing it to go idle. Invoke like `cargo.kill()`. - */ -/** - * Creates a `cargo` object with the specified payload. Tasks added to the - * cargo will be processed altogether (up to the `payload` limit). If the - * `worker` is in progress, the task is queued until it becomes available. Once - * the `worker` has completed some tasks, each callback of those tasks is - * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966) - * for how `cargo` and `queue` work. - * - * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers - * at a time, cargo passes an array of tasks to a single worker, repeating - * when the worker is finished. - * - * @name cargo - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.queue]{@link module:ControlFlow.queue} - * @category Control Flow - * @param {Function} worker - An asynchronous function for processing an array - * of queued tasks, which must call its `callback(err)` argument when finished, - * with an optional `err` argument. Invoked with `(tasks, callback)`. - * @param {number} [payload=Infinity] - An optional `integer` for determining - * how many tasks should be processed per round; if omitted, the default is - * unlimited. - * @returns {module:ControlFlow.CargoObject} A cargo object to manage the tasks. Callbacks can - * attached as certain properties to listen for specific events during the - * lifecycle of the cargo and inner queue. - * @example - * - * // create a cargo object with payload 2 - * var cargo = async.cargo(function(tasks, callback) { - * for (var i=0; i<tasks.length; i++) { - * console.log('hello ' + tasks[i].name); - * } - * callback(); - * }, 2); - * - * // add some items - * cargo.push({name: 'foo'}, function(err) { - * console.log('finished processing foo'); - * }); - * cargo.push({name: 'bar'}, function(err) { - * console.log('finished processing bar'); - * }); - * cargo.push({name: 'baz'}, function(err) { - * console.log('finished processing baz'); - * }); - */ -function cargo(worker, payload) { - return queue(worker, 1, payload); -} -/** - * The same as [`eachOf`]{@link module:Collections.eachOf} but runs only a single async operation at a time. - * - * @name eachOfSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.eachOf]{@link module:Collections.eachOf} - * @alias forEachOfSeries - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. The - * `key` is the item's key, or index in the case of an array. The iteratee is - * passed a `callback(err)` which must be called once it has completed. If no - * error has occurred, the callback should be run without arguments or with an - * explicit `null` argument. Invoked with (item, key, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. Invoked with (err). - */ -var eachOfSeries = doLimit(eachOfLimit, 1); -/** - * Reduces `coll` into a single value using an async `iteratee` to return each - * successive step. `memo` is the initial state of the reduction. This function - * only operates in series. - * - * For performance reasons, it may make sense to split a call to this function - * into a parallel map, and then use the normal `Array.prototype.reduce` on the - * results. This function is for situations where each step in the reduction - * needs to be async; if you can get the data before reducing it, then it's - * probably a good idea to do so. - * - * @name reduce - * @static - * @memberOf module:Collections - * @method - * @alias inject - * @alias foldl - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {*} memo - The initial state of the reduction. - * @param {Function} iteratee - A function applied to each item in the - * array to produce the next step in the reduction. The `iteratee` is passed a - * `callback(err, reduction)` which accepts an optional error as its first - * argument, and the state of the reduction as the second. If an error is - * passed to the callback, the reduction is stopped and the main `callback` is - * immediately called with the error. Invoked with (memo, item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result is the reduced value. Invoked with - * (err, result). - * @example - * - * async.reduce([1,2,3], 0, function(memo, item, callback) { - * // pointless async: - * process.nextTick(function() { - * callback(null, memo + item) - * }); - * }, function(err, result) { - * // result is now equal to the last value of memo, which is 6 - * }); - */ -function reduce(coll, memo, iteratee, callback) { - callback = once(callback || noop); - eachOfSeries(coll, function (x, i, callback) { - iteratee(memo, x, function (err, v) { - memo = v; - callback(err); - }); - }, function (err) { - callback(err, memo); - }); -} + async.retry = function(times, task, callback) { + var DEFAULT_TIMES = 5; + var DEFAULT_INTERVAL = 0; -/** - * Version of the compose function that is more natural to read. Each function - * consumes the return value of the previous function. It is the equivalent of - * [compose]{@link module:ControlFlow.compose} with the arguments reversed. - * - * Each function is executed with the `this` binding of the composed function. - * - * @name seq - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.compose]{@link module:ControlFlow.compose} - * @category Control Flow - * @param {...Function} functions - the asynchronous functions to compose - * @returns {Function} a function that composes the `functions` in order - * @example - * - * // Requires lodash (or underscore), express3 and dresende's orm2. - * // Part of an app, that fetches cats of the logged user. - * // This example uses `seq` function to avoid overnesting and error - * // handling clutter. - * app.get('/cats', function(request, response) { - * var User = request.models.User; - * async.seq( - * _.bind(User.get, User), // 'User.get' has signature (id, callback(err, data)) - * function(user, fn) { - * user.getCats(fn); // 'getCats' has signature (callback(err, data)) - * } - * )(req.session.user_id, function (err, cats) { - * if (err) { - * console.error(err); - * response.json({ status: 'error', message: err.message }); - * } else { - * response.json({ status: 'ok', message: 'Cats found', data: cats }); - * } - * }); - * }); - */ -var seq$1 = baseRest$1(function seq(functions) { - return baseRest$1(function (args) { - var that = this; + var attempts = []; - var cb = args[args.length - 1]; - if (typeof cb == 'function') { - args.pop(); - } else { - cb = noop; + var opts = { + times: DEFAULT_TIMES, + interval: DEFAULT_INTERVAL + }; + + function parseTimes(acc, t){ + if(typeof t === 'number'){ + acc.times = parseInt(t, 10) || DEFAULT_TIMES; + } else if(typeof t === 'object'){ + acc.times = parseInt(t.times, 10) || DEFAULT_TIMES; + acc.interval = parseInt(t.interval, 10) || DEFAULT_INTERVAL; + } else { + throw new Error('Unsupported argument type for \'times\': ' + typeof t); + } } - reduce(functions, args, function (newargs, fn, cb) { - fn.apply(that, newargs.concat([baseRest$1(function (err, nextargs) { - cb(err, nextargs); - })])); - }, function (err, results) { - cb.apply(that, [err].concat(results)); - }); - }); -}); + var length = arguments.length; + if (length < 1 || length > 3) { + throw new Error('Invalid arguments - must be either (task), (task, callback), (times, task) or (times, task, callback)'); + } else if (length <= 2 && typeof times === 'function') { + callback = task; + task = times; + } + if (typeof times !== 'function') { + parseTimes(opts, times); + } + opts.callback = callback; + opts.task = task; + + function wrappedTask(wrappedCallback, wrappedResults) { + function retryAttempt(task, finalAttempt) { + return function(seriesCallback) { + task(function(err, result){ + seriesCallback(!err || finalAttempt, {err: err, result: result}); + }, wrappedResults); + }; + } -/** - * Creates a function which is a composition of the passed asynchronous - * functions. Each function consumes the return value of the function that - * follows. Composing functions `f()`, `g()`, and `h()` would produce the result - * of `f(g(h()))`, only this version uses callbacks to obtain the return values. - * - * Each function is executed with the `this` binding of the composed function. - * - * @name compose - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {...Function} functions - the asynchronous functions to compose - * @returns {Function} an asynchronous function that is the composed - * asynchronous `functions` - * @example - * - * function add1(n, callback) { - * setTimeout(function () { - * callback(null, n + 1); - * }, 10); - * } - * - * function mul3(n, callback) { - * setTimeout(function () { - * callback(null, n * 3); - * }, 10); - * } - * - * var add1mul3 = async.compose(mul3, add1); - * add1mul3(4, function (err, result) { - * // result now equals 15 - * }); - */ -var compose = baseRest$1(function (args) { - return seq$1.apply(null, args.reverse()); -}); - -function concat$1(eachfn, arr, fn, callback) { - var result = []; - eachfn(arr, function (x, index, cb) { - fn(x, function (err, y) { - result = result.concat(y || []); - cb(err); - }); - }, function (err) { - callback(err, result); - }); -} - -/** - * Applies `iteratee` to each item in `coll`, concatenating the results. Returns - * the concatenated list. The `iteratee`s are called in parallel, and the - * results are concatenated as they return. There is no guarantee that the - * results array will be returned in the original order of `coll` passed to the - * `iteratee` function. - * - * @name concat - * @static - * @memberOf module:Collections - * @method - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, results)` which must be called once - * it has completed with an error (which can be `null`) and an array of results. - * Invoked with (item, callback). - * @param {Function} [callback(err)] - A callback which is called after all the - * `iteratee` functions have finished, or an error occurs. Results is an array - * containing the concatenated results of the `iteratee` function. Invoked with - * (err, results). - * @example - * - * async.concat(['dir1','dir2','dir3'], fs.readdir, function(err, files) { - * // files is now a list of filenames that exist in the 3 directories - * }); - */ -var concat = doParallel(concat$1); + function retryInterval(interval){ + return function(seriesCallback){ + setTimeout(function(){ + seriesCallback(null); + }, interval); + }; + } -function doSeries(fn) { - return function (obj, iteratee, callback) { - return fn(eachOfSeries, obj, iteratee, callback); - }; -} + while (opts.times) { -/** - * The same as [`concat`]{@link module:Collections.concat} but runs only a single async operation at a time. - * - * @name concatSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.concat]{@link module:Collections.concat} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, results)` which must be called once - * it has completed with an error (which can be `null`) and an array of results. - * Invoked with (item, callback). - * @param {Function} [callback(err)] - A callback which is called after all the - * `iteratee` functions have finished, or an error occurs. Results is an array - * containing the concatenated results of the `iteratee` function. Invoked with - * (err, results). - */ -var concatSeries = doSeries(concat$1); + var finalAttempt = !(opts.times-=1); + attempts.push(retryAttempt(opts.task, finalAttempt)); + if(!finalAttempt && opts.interval > 0){ + attempts.push(retryInterval(opts.interval)); + } + } -/** - * Returns a function that when called, calls-back with the values provided. - * Useful as the first function in a [`waterfall`]{@link module:ControlFlow.waterfall}, or for plugging values in to - * [`auto`]{@link module:ControlFlow.auto}. - * - * @name constant - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {...*} arguments... - Any number of arguments to automatically invoke - * callback with. - * @returns {Function} Returns a function that when invoked, automatically - * invokes the callback with the previous given arguments. - * @example - * - * async.waterfall([ - * async.constant(42), - * function (value, next) { - * // value === 42 - * }, - * //... - * ], callback); - * - * async.waterfall([ - * async.constant(filename, "utf8"), - * fs.readFile, - * function (fileData, next) { - * //... - * } - * //... - * ], callback); - * - * async.auto({ - * hostname: async.constant("https://server.net/"), - * port: findFreePort, - * launchServer: ["hostname", "port", function (options, cb) { - * startServer(options, cb); - * }], - * //... - * }, callback); - */ -var constant$2 = baseRest$1(function (values) { - var args = [null].concat(values); - return initialParams(function (ignoredArgs, callback) { - return callback.apply(this, args); - }); -}); + async.series(attempts, function(done, data){ + data = data[data.length - 1]; + (wrappedCallback || opts.callback)(data.err, data.result); + }); + } -function _createTester(eachfn, check, getResult) { - return function (arr, limit, iteratee, cb) { - function done() { - if (cb) { - cb(null, getResult(false)); - } + // If a callback is passed, run this as a controll flow + return opts.callback ? wrappedTask() : wrappedTask; + }; + + async.waterfall = function (tasks, callback) { + callback = _once(callback || noop); + if (!_isArray(tasks)) { + var err = new Error('First argument to waterfall must be an array of functions'); + return callback(err); } - function wrappedIteratee(x, _, callback) { - if (!cb) return callback(); - iteratee(x, function (err, v) { - // Check cb as another iteratee may have resolved with a - // value or error since we started this iteratee - if (cb && (err || check(v))) { - if (err) cb(err);else cb(err, getResult(true, x)); - cb = iteratee = false; - callback(err, breakLoop); - } else { - callback(); + if (!tasks.length) { + return callback(); + } + function wrapIterator(iterator) { + return _restParam(function (err, args) { + if (err) { + callback.apply(null, [err].concat(args)); + } + else { + var next = iterator.next(); + if (next) { + args.push(wrapIterator(next)); + } + else { + args.push(callback); + } + ensureAsync(iterator).apply(null, args); } }); } - if (arguments.length > 3) { - cb = cb || noop; - eachfn(arr, limit, wrappedIteratee, done); - } else { - cb = iteratee; - cb = cb || noop; - iteratee = limit; - eachfn(arr, wrappedIteratee, done); - } + wrapIterator(async.iterator(tasks))(); }; -} -function _findGetResult(v, x) { - return x; -} + function _parallel(eachfn, tasks, callback) { + callback = callback || noop; + var results = _isArrayLike(tasks) ? [] : {}; -/** - * Returns the first value in `coll` that passes an async truth test. The - * `iteratee` is applied in parallel, meaning the first iteratee to return - * `true` will fire the detect `callback` with that result. That means the - * result might not be the first item in the original `coll` (in terms of order) - * that passes the test. + eachfn(tasks, function (task, key, callback) { + task(_restParam(function (err, args) { + if (args.length <= 1) { + args = args[0]; + } + results[key] = args; + callback(err); + })); + }, function (err) { + callback(err, results); + }); + } - * If order within the original `coll` is important, then look at - * [`detectSeries`]{@link module:Collections.detectSeries}. - * - * @name detect - * @static - * @memberOf module:Collections - * @method - * @alias find - * @category Collections - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The iteratee is passed a `callback(err, truthValue)` which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the `iteratee` functions have finished. - * Result will be the first item in the array that passes the truth test - * (iteratee) or the value `undefined` if none passed. Invoked with - * (err, result). - * @example - * - * async.detect(['file1','file2','file3'], function(filePath, callback) { - * fs.access(filePath, function(err) { - * callback(null, !err) - * }); - * }, function(err, result) { - * // result now equals the first file in the list that exists - * }); - */ -var detect = _createTester(eachOf, identity, _findGetResult); + async.parallel = function (tasks, callback) { + _parallel(async.eachOf, tasks, callback); + }; -/** - * The same as [`detect`]{@link module:Collections.detect} but runs a maximum of `limit` async operations at a - * time. - * - * @name detectLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.detect]{@link module:Collections.detect} - * @alias findLimit - * @category Collections - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The iteratee is passed a `callback(err, truthValue)` which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the `iteratee` functions have finished. - * Result will be the first item in the array that passes the truth test - * (iteratee) or the value `undefined` if none passed. Invoked with - * (err, result). - */ -var detectLimit = _createTester(eachOfLimit, identity, _findGetResult); + async.parallelLimit = function(tasks, limit, callback) { + _parallel(_eachOfLimit(limit), tasks, callback); + }; -/** - * The same as [`detect`]{@link module:Collections.detect} but runs only a single async operation at a time. - * - * @name detectSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.detect]{@link module:Collections.detect} - * @alias findSeries - * @category Collections - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The iteratee is passed a `callback(err, truthValue)` which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the `iteratee` functions have finished. - * Result will be the first item in the array that passes the truth test - * (iteratee) or the value `undefined` if none passed. Invoked with - * (err, result). - */ -var detectSeries = _createTester(eachOfSeries, identity, _findGetResult); + async.series = function(tasks, callback) { + _parallel(async.eachOfSeries, tasks, callback); + }; -function consoleFunc(name) { - return baseRest$1(function (fn, args) { - fn.apply(null, args.concat([baseRest$1(function (err, args) { - if (typeof console === 'object') { - if (err) { - if (console.error) { - console.error(err); - } - } else if (console[name]) { - arrayEach(args, function (x) { - console[name](x); - }); + async.iterator = function (tasks) { + function makeCallback(index) { + function fn() { + if (tasks.length) { + tasks[index].apply(null, arguments); } + return fn.next(); } - })])); - }); -} - -/** - * Logs the result of an `async` function to the `console` using `console.dir` - * to display the properties of the resulting object. Only works in Node.js or - * in browsers that support `console.dir` and `console.error` (such as FF and - * Chrome). If multiple arguments are returned from the async function, - * `console.dir` is called on each argument in order. - * - * @name dir - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} function - The function you want to eventually apply all - * arguments to. - * @param {...*} arguments... - Any number of arguments to apply to the function. - * @example - * - * // in a module - * var hello = function(name, callback) { - * setTimeout(function() { - * callback(null, {hello: name}); - * }, 1000); - * }; - * - * // in the node repl - * node> async.dir(hello, 'world'); - * {hello: 'world'} - */ -var dir = consoleFunc('dir'); - -/** - * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in - * the order of operations, the arguments `test` and `fn` are switched. - * - * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function. - * @name doDuring - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.during]{@link module:ControlFlow.during} - * @category Control Flow - * @param {Function} fn - A function which is called each time `test` passes. - * The function is passed a `callback(err)`, which must be called once it has - * completed with an optional `err` argument. Invoked with (callback). - * @param {Function} test - asynchronous truth test to perform before each - * execution of `fn`. Invoked with (...args, callback), where `...args` are the - * non-error args from the previous callback of `fn`. - * @param {Function} [callback] - A callback which is called after the test - * function has failed and repeated execution of `fn` has stopped. `callback` - * will be passed an error if one occured, otherwise `null`. - */ -function doDuring(fn, test, callback) { - callback = onlyOnce(callback || noop); + fn.next = function () { + return (index < tasks.length - 1) ? makeCallback(index + 1): null; + }; + return fn; + } + return makeCallback(0); + }; - var next = baseRest$1(function (err, args) { - if (err) return callback(err); - args.push(check); - test.apply(this, args); + async.apply = _restParam(function (fn, args) { + return _restParam(function (callArgs) { + return fn.apply( + null, args.concat(callArgs) + ); + }); }); - function check(err, truth) { - if (err) return callback(err); - if (!truth) return callback(null); - fn(next); + function _concat(eachfn, arr, fn, callback) { + var result = []; + eachfn(arr, function (x, index, cb) { + fn(x, function (err, y) { + result = result.concat(y || []); + cb(err); + }); + }, function (err) { + callback(err, result); + }); } + async.concat = doParallel(_concat); + async.concatSeries = doSeries(_concat); - check(null, true); -} - -/** - * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in - * the order of operations, the arguments `test` and `iteratee` are switched. - * - * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript. - * - * @name doWhilst - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.whilst]{@link module:ControlFlow.whilst} - * @category Control Flow - * @param {Function} iteratee - A function which is called each time `test` - * passes. The function is passed a `callback(err)`, which must be called once - * it has completed with an optional `err` argument. Invoked with (callback). - * @param {Function} test - synchronous truth test to perform after each - * execution of `iteratee`. Invoked with the non-error callback results of - * `iteratee`. - * @param {Function} [callback] - A callback which is called after the test - * function has failed and repeated execution of `iteratee` has stopped. - * `callback` will be passed an error and any arguments passed to the final - * `iteratee`'s callback. Invoked with (err, [results]); - */ -function doWhilst(iteratee, test, callback) { - callback = onlyOnce(callback || noop); - var next = baseRest$1(function (err, args) { - if (err) return callback(err); - if (test.apply(this, args)) return iteratee(next); - callback.apply(null, [null].concat(args)); - }); - iteratee(next); -} - -/** - * Like ['doWhilst']{@link module:ControlFlow.doWhilst}, except the `test` is inverted. Note the - * argument ordering differs from `until`. - * - * @name doUntil - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.doWhilst]{@link module:ControlFlow.doWhilst} - * @category Control Flow - * @param {Function} fn - A function which is called each time `test` fails. - * The function is passed a `callback(err)`, which must be called once it has - * completed with an optional `err` argument. Invoked with (callback). - * @param {Function} test - synchronous truth test to perform after each - * execution of `fn`. Invoked with the non-error callback results of `fn`. - * @param {Function} [callback] - A callback which is called after the test - * function has passed and repeated execution of `fn` has stopped. `callback` - * will be passed an error and any arguments passed to the final `fn`'s - * callback. Invoked with (err, [results]); - */ -function doUntil(fn, test, callback) { - doWhilst(fn, function () { - return !test.apply(this, arguments); - }, callback); -} - -/** - * Like [`whilst`]{@link module:ControlFlow.whilst}, except the `test` is an asynchronous function that - * is passed a callback in the form of `function (err, truth)`. If error is - * passed to `test` or `fn`, the main callback is immediately called with the - * value of the error. - * - * @name during - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.whilst]{@link module:ControlFlow.whilst} - * @category Control Flow - * @param {Function} test - asynchronous truth test to perform before each - * execution of `fn`. Invoked with (callback). - * @param {Function} fn - A function which is called each time `test` passes. - * The function is passed a `callback(err)`, which must be called once it has - * completed with an optional `err` argument. Invoked with (callback). - * @param {Function} [callback] - A callback which is called after the test - * function has failed and repeated execution of `fn` has stopped. `callback` - * will be passed an error, if one occured, otherwise `null`. - * @example - * - * var count = 0; - * - * async.during( - * function (callback) { - * return callback(null, count < 5); - * }, - * function (callback) { - * count++; - * setTimeout(callback, 1000); - * }, - * function (err) { - * // 5 seconds have passed - * } - * ); - */ -function during(test, fn, callback) { - callback = onlyOnce(callback || noop); - - function next(err) { - if (err) return callback(err); - test(check); - } + async.whilst = function (test, iterator, callback) { + callback = callback || noop; + if (test()) { + var next = _restParam(function(err, args) { + if (err) { + callback(err); + } else if (test.apply(this, args)) { + iterator(next); + } else { + callback.apply(null, [null].concat(args)); + } + }); + iterator(next); + } else { + callback(null); + } + }; - function check(err, truth) { - if (err) return callback(err); - if (!truth) return callback(null); - fn(next); - } + async.doWhilst = function (iterator, test, callback) { + var calls = 0; + return async.whilst(function() { + return ++calls <= 1 || test.apply(this, arguments); + }, iterator, callback); + }; - test(check); -} + async.until = function (test, iterator, callback) { + return async.whilst(function() { + return !test.apply(this, arguments); + }, iterator, callback); + }; -function _withoutIndex(iteratee) { - return function (value, index, callback) { - return iteratee(value, callback); + async.doUntil = function (iterator, test, callback) { + return async.doWhilst(iterator, function() { + return !test.apply(this, arguments); + }, callback); }; -} - -/** - * Applies the function `iteratee` to each item in `coll`, in parallel. - * The `iteratee` is called with an item from the list, and a callback for when - * it has finished. If the `iteratee` passes an error to its `callback`, the - * main `callback` (for the `each` function) is immediately called with the - * error. - * - * Note, that since this function applies `iteratee` to each item in parallel, - * there is no guarantee that the iteratee functions will complete in order. - * - * @name each - * @static - * @memberOf module:Collections - * @method - * @alias forEach - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item - * in `coll`. The iteratee is passed a `callback(err)` which must be called once - * it has completed. If no error has occurred, the `callback` should be run - * without arguments or with an explicit `null` argument. The array index is not - * passed to the iteratee. Invoked with (item, callback). If you need the index, - * use `eachOf`. - * @param {Function} [callback] - A callback which is called when all - * `iteratee` functions have finished, or an error occurs. Invoked with (err). - * @example - * - * // assuming openFiles is an array of file names and saveFile is a function - * // to save the modified contents of that file: - * - * async.each(openFiles, saveFile, function(err){ - * // if any of the saves produced an error, err would equal that error - * }); - * - * // assuming openFiles is an array of file names - * async.each(openFiles, function(file, callback) { - * - * // Perform operation on file here. - * console.log('Processing file ' + file); - * - * if( file.length > 32 ) { - * console.log('This file name is too long'); - * callback('File name too long'); - * } else { - * // Do work to process file here - * console.log('File processed'); - * callback(); - * } - * }, function(err) { - * // if any of the file processing produced an error, err would equal that error - * if( err ) { - * // One of the iterations produced an error. - * // All processing will now stop. - * console.log('A file failed to process'); - * } else { - * console.log('All files have been processed successfully'); - * } - * }); - */ -function eachLimit(coll, iteratee, callback) { - eachOf(coll, _withoutIndex(iteratee), callback); -} -/** - * The same as [`each`]{@link module:Collections.each} but runs a maximum of `limit` async operations at a time. - * - * @name eachLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.each]{@link module:Collections.each} - * @alias forEachLimit - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A function to apply to each item in `coll`. The - * iteratee is passed a `callback(err)` which must be called once it has - * completed. If no error has occurred, the `callback` should be run without - * arguments or with an explicit `null` argument. The array index is not passed - * to the iteratee. Invoked with (item, callback). If you need the index, use - * `eachOfLimit`. - * @param {Function} [callback] - A callback which is called when all - * `iteratee` functions have finished, or an error occurs. Invoked with (err). - */ -function eachLimit$1(coll, limit, iteratee, callback) { - _eachOfLimit(limit)(coll, _withoutIndex(iteratee), callback); -} + async.during = function (test, iterator, callback) { + callback = callback || noop; -/** - * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time. - * - * @name eachSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.each]{@link module:Collections.each} - * @alias forEachSeries - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each - * item in `coll`. The iteratee is passed a `callback(err)` which must be called - * once it has completed. If no error has occurred, the `callback` should be run - * without arguments or with an explicit `null` argument. The array index is - * not passed to the iteratee. Invoked with (item, callback). If you need the - * index, use `eachOfSeries`. - * @param {Function} [callback] - A callback which is called when all - * `iteratee` functions have finished, or an error occurs. Invoked with (err). - */ -var eachSeries = doLimit(eachLimit$1, 1); - -/** - * Wrap an async function and ensure it calls its callback on a later tick of - * the event loop. If the function already calls its callback on a next tick, - * no extra deferral is added. This is useful for preventing stack overflows - * (`RangeError: Maximum call stack size exceeded`) and generally keeping - * [Zalgo](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony) - * contained. - * - * @name ensureAsync - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} fn - an async function, one that expects a node-style - * callback as its last argument. - * @returns {Function} Returns a wrapped function with the exact same call - * signature as the function passed in. - * @example - * - * function sometimesAsync(arg, callback) { - * if (cache[arg]) { - * return callback(null, cache[arg]); // this would be synchronous!! - * } else { - * doSomeIO(arg, callback); // this IO would be asynchronous - * } - * } - * - * // this has a risk of stack overflows if many results are cached in a row - * async.mapSeries(args, sometimesAsync, done); - * - * // this will defer sometimesAsync's callback if necessary, - * // preventing stack overflows - * async.mapSeries(args, async.ensureAsync(sometimesAsync), done); - */ -function ensureAsync(fn) { - return initialParams(function (args, callback) { - var sync = true; - args.push(function () { - var innerArgs = arguments; - if (sync) { - setImmediate$1(function () { - callback.apply(null, innerArgs); - }); + var next = _restParam(function(err, args) { + if (err) { + callback(err); } else { - callback.apply(null, innerArgs); + args.push(check); + test.apply(this, args); } }); - fn.apply(this, args); - sync = false; - }); -} - -function notId(v) { - return !v; -} - -/** - * Returns `true` if every element in `coll` satisfies an async test. If any - * iteratee call returns `false`, the main `callback` is immediately called. - * - * @name every - * @static - * @memberOf module:Collections - * @method - * @alias all - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in the - * collection in parallel. The iteratee is passed a `callback(err, truthValue)` - * which must be called with a boolean argument once it has completed. Invoked - * with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result will be either `true` or `false` - * depending on the values of the async tests. Invoked with (err, result). - * @example - * - * async.every(['file1','file2','file3'], function(filePath, callback) { - * fs.access(filePath, function(err) { - * callback(null, !err) - * }); - * }, function(err, result) { - * // if result is true then every file exists - * }); - */ -var every = _createTester(eachOf, notId, notId); - -/** - * The same as [`every`]{@link module:Collections.every} but runs a maximum of `limit` async operations at a time. - * - * @name everyLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.every]{@link module:Collections.every} - * @alias allLimit - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A truth test to apply to each item in the - * collection in parallel. The iteratee is passed a `callback(err, truthValue)` - * which must be called with a boolean argument once it has completed. Invoked - * with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result will be either `true` or `false` - * depending on the values of the async tests. Invoked with (err, result). - */ -var everyLimit = _createTester(eachOfLimit, notId, notId); - -/** - * The same as [`every`]{@link module:Collections.every} but runs only a single async operation at a time. - * - * @name everySeries - * @static - * @memberOf module:Collections - * @method - * @see [async.every]{@link module:Collections.every} - * @alias allSeries - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in the - * collection in parallel. The iteratee is passed a `callback(err, truthValue)` - * which must be called with a boolean argument once it has completed. Invoked - * with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result will be either `true` or `false` - * depending on the values of the async tests. Invoked with (err, result). - */ -var everySeries = doLimit(everyLimit, 1); -/** - * The base implementation of `_.property` without support for deep paths. - * - * @private - * @param {string} key The key of the property to get. - * @returns {Function} Returns the new accessor function. - */ -function baseProperty(key) { - return function(object) { - return object == null ? undefined : object[key]; - }; -} - -function _filter(eachfn, arr, iteratee, callback) { - callback = once(callback || noop); - var results = []; - eachfn(arr, function (x, index, callback) { - iteratee(x, function (err, v) { + var check = function(err, truth) { if (err) { callback(err); + } else if (truth) { + iterator(next); } else { - if (v) { - results.push({ index: index, value: x }); - } - callback(); + callback(null); } - }); - }, function (err) { - if (err) { - callback(err); - } else { - callback(null, arrayMap(results.sort(function (a, b) { - return a.index - b.index; - }), baseProperty('value'))); - } - }); -} - -/** - * Returns a new array of all the values in `coll` which pass an async truth - * test. This operation is performed in parallel, but the results array will be - * in the same order as the original. - * - * @name filter - * @static - * @memberOf module:Collections - * @method - * @alias select - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results). - * @example - * - * async.filter(['file1','file2','file3'], function(filePath, callback) { - * fs.access(filePath, function(err) { - * callback(null, !err) - * }); - * }, function(err, results) { - * // results now equals an array of the existing files - * }); - */ -var filter = doParallel(_filter); + }; -/** - * The same as [`filter`]{@link module:Collections.filter} but runs a maximum of `limit` async operations at a - * time. - * - * @name filterLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.filter]{@link module:Collections.filter} - * @alias selectLimit - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results). - */ -var filterLimit = doParallelLimit(_filter); - -/** - * The same as [`filter`]{@link module:Collections.filter} but runs only a single async operation at a time. - * - * @name filterSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.filter]{@link module:Collections.filter} - * @alias selectSeries - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results) - */ -var filterSeries = doLimit(filterLimit, 1); - -/** - * Calls the asynchronous function `fn` with a callback parameter that allows it - * to call itself again, in series, indefinitely. - - * If an error is passed to the - * callback then `errback` is called with the error, and execution stops, - * otherwise it will never be called. - * - * @name forever - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Function} fn - a function to call repeatedly. Invoked with (next). - * @param {Function} [errback] - when `fn` passes an error to it's callback, - * this function will be called, and execution stops. Invoked with (err). - * @example - * - * async.forever( - * function(next) { - * // next is suitable for passing to things that need a callback(err [, whatever]); - * // it will result in this function being called again. - * }, - * function(err) { - * // if next is called with a value in its first parameter, it will appear - * // in here as 'err', and execution will stop. - * } - * ); - */ -function forever(fn, errback) { - var done = onlyOnce(errback || noop); - var task = ensureAsync(fn); - - function next(err) { - if (err) return done(err); - task(next); - } - next(); -} - -/** - * Logs the result of an `async` function to the `console`. Only works in - * Node.js or in browsers that support `console.log` and `console.error` (such - * as FF and Chrome). If multiple arguments are returned from the async - * function, `console.log` is called on each argument in order. - * - * @name log - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} function - The function you want to eventually apply all - * arguments to. - * @param {...*} arguments... - Any number of arguments to apply to the function. - * @example - * - * // in a module - * var hello = function(name, callback) { - * setTimeout(function() { - * callback(null, 'hello ' + name); - * }, 1000); - * }; - * - * // in the node repl - * node> async.log(hello, 'world'); - * 'hello world' - */ -var log = consoleFunc('log'); - -/** - * The same as [`mapValues`]{@link module:Collections.mapValues} but runs a maximum of `limit` async operations at a - * time. - * - * @name mapValuesLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.mapValues]{@link module:Collections.mapValues} - * @category Collection - * @param {Object} obj - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A function to apply to each value in `obj`. - * The iteratee is passed a `callback(err, transformed)` which must be called - * once it has completed with an error (which can be `null`) and a - * transformed value. Invoked with (value, key, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. `result` is a new object consisting - * of each key from `obj`, with each transformed value on the right-hand side. - * Invoked with (err, result). - */ -function mapValuesLimit(obj, limit, iteratee, callback) { - callback = once(callback || noop); - var newObj = {}; - eachOfLimit(obj, limit, function (val, key, next) { - iteratee(val, key, function (err, result) { - if (err) return next(err); - newObj[key] = result; - next(); - }); - }, function (err) { - callback(err, newObj); - }); -} - -/** - * A relative of [`map`]{@link module:Collections.map}, designed for use with objects. - * - * Produces a new Object by mapping each value of `obj` through the `iteratee` - * function. The `iteratee` is called each `value` and `key` from `obj` and a - * callback for when it has finished processing. Each of these callbacks takes - * two arguments: an `error`, and the transformed item from `obj`. If `iteratee` - * passes an error to its callback, the main `callback` (for the `mapValues` - * function) is immediately called with the error. - * - * Note, the order of the keys in the result is not guaranteed. The keys will - * be roughly in the order they complete, (but this is very engine-specific) - * - * @name mapValues - * @static - * @memberOf module:Collections - * @method - * @category Collection - * @param {Object} obj - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each value and key in - * `coll`. The iteratee is passed a `callback(err, transformed)` which must be - * called once it has completed with an error (which can be `null`) and a - * transformed value. Invoked with (value, key, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. `result` is a new object consisting - * of each key from `obj`, with each transformed value on the right-hand side. - * Invoked with (err, result). - * @example - * - * async.mapValues({ - * f1: 'file1', - * f2: 'file2', - * f3: 'file3' - * }, function (file, key, callback) { - * fs.stat(file, callback); - * }, function(err, result) { - * // result is now a map of stats for each file, e.g. - * // { - * // f1: [stats for file1], - * // f2: [stats for file2], - * // f3: [stats for file3] - * // } - * }); - */ - -var mapValues = doLimit(mapValuesLimit, Infinity); - -/** - * The same as [`mapValues`]{@link module:Collections.mapValues} but runs only a single async operation at a time. - * - * @name mapValuesSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.mapValues]{@link module:Collections.mapValues} - * @category Collection - * @param {Object} obj - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each value in `obj`. - * The iteratee is passed a `callback(err, transformed)` which must be called - * once it has completed with an error (which can be `null`) and a - * transformed value. Invoked with (value, key, callback). - * @param {Function} [callback] - A callback which is called when all `iteratee` - * functions have finished, or an error occurs. `result` is a new object consisting - * of each key from `obj`, with each transformed value on the right-hand side. - * Invoked with (err, result). - */ -var mapValuesSeries = doLimit(mapValuesLimit, 1); - -function has(obj, key) { - return key in obj; -} + test(check); + }; -/** - * Caches the results of an `async` function. When creating a hash to store - * function results against, the callback is omitted from the hash and an - * optional hash function can be used. - * - * If no hash function is specified, the first argument is used as a hash key, - * which may work reasonably if it is a string or a data type that converts to a - * distinct string. Note that objects and arrays will not behave reasonably. - * Neither will cases where the other arguments are significant. In such cases, - * specify your own hash function. - * - * The cache of results is exposed as the `memo` property of the function - * returned by `memoize`. - * - * @name memoize - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} fn - The function to proxy and cache results from. - * @param {Function} hasher - An optional function for generating a custom hash - * for storing results. It has all the arguments applied to it apart from the - * callback, and must be synchronous. - * @returns {Function} a memoized version of `fn` - * @example - * - * var slow_fn = function(name, callback) { - * // do something - * callback(null, result); - * }; - * var fn = async.memoize(slow_fn); - * - * // fn can now be used as if it were slow_fn - * fn('some name', function() { - * // callback - * }); - */ -function memoize(fn, hasher) { - var memo = Object.create(null); - var queues = Object.create(null); - hasher = hasher || identity; - var memoized = initialParams(function memoized(args, callback) { - var key = hasher.apply(null, args); - if (has(memo, key)) { - setImmediate$1(function () { - callback.apply(null, memo[key]); - }); - } else if (has(queues, key)) { - queues[key].push(callback); - } else { - queues[key] = [callback]; - fn.apply(null, args.concat([baseRest$1(function (args) { - memo[key] = args; - var q = queues[key]; - delete queues[key]; - for (var i = 0, l = q.length; i < l; i++) { - q[i].apply(null, args); - } - })])); - } - }); - memoized.memo = memo; - memoized.unmemoized = fn; - return memoized; -} - -/** - * Calls `callback` on a later loop around the event loop. In Node.js this just - * calls `setImmediate`. In the browser it will use `setImmediate` if - * available, otherwise `setTimeout(callback, 0)`, which means other higher - * priority events may precede the execution of `callback`. - * - * This is used internally for browser-compatibility purposes. - * - * @name nextTick - * @static - * @memberOf module:Utils - * @method - * @alias setImmediate - * @category Util - * @param {Function} callback - The function to call on a later loop around - * the event loop. Invoked with (args...). - * @param {...*} args... - any number of additional arguments to pass to the - * callback on the next tick. - * @example - * - * var call_order = []; - * async.nextTick(function() { - * call_order.push('two'); - * // call_order now equals ['one','two'] - * }); - * call_order.push('one'); - * - * async.setImmediate(function (a, b, c) { - * // a, b, and c equal 1, 2, and 3 - * }, 1, 2, 3); - */ -var _defer$1; - -if (hasNextTick) { - _defer$1 = process.nextTick; -} else if (hasSetImmediate) { - _defer$1 = setImmediate; -} else { - _defer$1 = fallback; -} - -var nextTick = wrap(_defer$1); - -function _parallel(eachfn, tasks, callback) { - callback = callback || noop; - var results = isArrayLike(tasks) ? [] : {}; - - eachfn(tasks, function (task, key, callback) { - task(baseRest$1(function (err, args) { - if (args.length <= 1) { - args = args[0]; + async.doDuring = function (iterator, test, callback) { + var calls = 0; + async.during(function(next) { + if (calls++ < 1) { + next(null, true); + } else { + test.apply(this, arguments); } - results[key] = args; - callback(err); - })); - }, function (err) { - callback(err, results); - }); -} - -/** - * Run the `tasks` collection of functions in parallel, without waiting until - * the previous function has completed. If any of the functions pass an error to - * its callback, the main `callback` is immediately called with the value of the - * error. Once the `tasks` have completed, the results are passed to the final - * `callback` as an array. - * - * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about - * parallel execution of code. If your tasks do not use any timers or perform - * any I/O, they will actually be executed in series. Any synchronous setup - * sections for each task will happen one after the other. JavaScript remains - * single-threaded. - * - * It is also possible to use an object instead of an array. Each property will - * be run as a function and the results will be passed to the final `callback` - * as an object instead of an array. This can be a more readable way of handling - * results from {@link async.parallel}. - * - * @name parallel - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Array|Iterable|Object} tasks - A collection containing functions to run. - * Each function is passed a `callback(err, result)` which it must call on - * completion with an error `err` (which can be `null`) and an optional `result` - * value. - * @param {Function} [callback] - An optional callback to run once all the - * functions have completed successfully. This function gets a results array - * (or object) containing all the result arguments passed to the task callbacks. - * Invoked with (err, results). - * @example - * async.parallel([ - * function(callback) { - * setTimeout(function() { - * callback(null, 'one'); - * }, 200); - * }, - * function(callback) { - * setTimeout(function() { - * callback(null, 'two'); - * }, 100); - * } - * ], - * // optional callback - * function(err, results) { - * // the results array will equal ['one','two'] even though - * // the second function had a shorter timeout. - * }); - * - * // an example using an object instead of an array - * async.parallel({ - * one: function(callback) { - * setTimeout(function() { - * callback(null, 1); - * }, 200); - * }, - * two: function(callback) { - * setTimeout(function() { - * callback(null, 2); - * }, 100); - * } - * }, function(err, results) { - * // results is now equals to: {one: 1, two: 2} - * }); - */ -function parallelLimit(tasks, callback) { - _parallel(eachOf, tasks, callback); -} - -/** - * The same as [`parallel`]{@link module:ControlFlow.parallel} but runs a maximum of `limit` async operations at a - * time. - * - * @name parallelLimit - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.parallel]{@link module:ControlFlow.parallel} - * @category Control Flow - * @param {Array|Collection} tasks - A collection containing functions to run. - * Each function is passed a `callback(err, result)` which it must call on - * completion with an error `err` (which can be `null`) and an optional `result` - * value. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} [callback] - An optional callback to run once all the - * functions have completed successfully. This function gets a results array - * (or object) containing all the result arguments passed to the task callbacks. - * Invoked with (err, results). - */ -function parallelLimit$1(tasks, limit, callback) { - _parallel(_eachOfLimit(limit), tasks, callback); -} - -/** - * A queue of tasks for the worker function to complete. - * @typedef {Object} QueueObject - * @memberOf module:ControlFlow - * @property {Function} length - a function returning the number of items - * waiting to be processed. Invoke with `queue.length()`. - * @property {boolean} started - a boolean indicating whether or not any - * items have been pushed and processed by the queue. - * @property {Function} running - a function returning the number of items - * currently being processed. Invoke with `queue.running()`. - * @property {Function} workersList - a function returning the array of items - * currently being processed. Invoke with `queue.workersList()`. - * @property {Function} idle - a function returning false if there are items - * waiting or being processed, or true if not. Invoke with `queue.idle()`. - * @property {number} concurrency - an integer for determining how many `worker` - * functions should be run in parallel. This property can be changed after a - * `queue` is created to alter the concurrency on-the-fly. - * @property {Function} push - add a new task to the `queue`. Calls `callback` - * once the `worker` has finished processing the task. Instead of a single task, - * a `tasks` array can be submitted. The respective callback is used for every - * task in the list. Invoke with `queue.push(task, [callback])`, - * @property {Function} unshift - add a new task to the front of the `queue`. - * Invoke with `queue.unshift(task, [callback])`. - * @property {Function} saturated - a callback that is called when the number of - * running workers hits the `concurrency` limit, and further tasks will be - * queued. - * @property {Function} unsaturated - a callback that is called when the number - * of running workers is less than the `concurrency` & `buffer` limits, and - * further tasks will not be queued. - * @property {number} buffer - A minimum threshold buffer in order to say that - * the `queue` is `unsaturated`. - * @property {Function} empty - a callback that is called when the last item - * from the `queue` is given to a `worker`. - * @property {Function} drain - a callback that is called when the last item - * from the `queue` has returned from the `worker`. - * @property {Function} error - a callback that is called when a task errors. - * Has the signature `function(error, task)`. - * @property {boolean} paused - a boolean for determining whether the queue is - * in a paused state. - * @property {Function} pause - a function that pauses the processing of tasks - * until `resume()` is called. Invoke with `queue.pause()`. - * @property {Function} resume - a function that resumes the processing of - * queued tasks when the queue is paused. Invoke with `queue.resume()`. - * @property {Function} kill - a function that removes the `drain` callback and - * empties remaining tasks from the queue forcing it to go idle. Invoke with `queue.kill()`. - */ + }, iterator, callback); + }; -/** - * Creates a `queue` object with the specified `concurrency`. Tasks added to the - * `queue` are processed in parallel (up to the `concurrency` limit). If all - * `worker`s are in progress, the task is queued until one becomes available. - * Once a `worker` completes a `task`, that `task`'s callback is called. - * - * @name queue - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Function} worker - An asynchronous function for processing a queued - * task, which must call its `callback(err)` argument when finished, with an - * optional `error` as an argument. If you want to handle errors from an - * individual task, pass a callback to `q.push()`. Invoked with - * (task, callback). - * @param {number} [concurrency=1] - An `integer` for determining how many - * `worker` functions should be run in parallel. If omitted, the concurrency - * defaults to `1`. If the concurrency is `0`, an error is thrown. - * @returns {module:ControlFlow.QueueObject} A queue object to manage the tasks. Callbacks can - * attached as certain properties to listen for specific events during the - * lifecycle of the queue. - * @example - * - * // create a queue object with concurrency 2 - * var q = async.queue(function(task, callback) { - * console.log('hello ' + task.name); - * callback(); - * }, 2); - * - * // assign a callback - * q.drain = function() { - * console.log('all items have been processed'); - * }; - * - * // add some items to the queue - * q.push({name: 'foo'}, function(err) { - * console.log('finished processing foo'); - * }); - * q.push({name: 'bar'}, function (err) { - * console.log('finished processing bar'); - * }); - * - * // add some items to the queue (batch-wise) - * q.push([{name: 'baz'},{name: 'bay'},{name: 'bax'}], function(err) { - * console.log('finished processing item'); - * }); - * - * // add some items to the front of the queue - * q.unshift({name: 'bar'}, function (err) { - * console.log('finished processing bar'); - * }); - */ -var queue$1 = function (worker, concurrency) { - return queue(function (items, cb) { - worker(items[0], cb); - }, concurrency, 1); -}; - -/** - * The same as [async.queue]{@link module:ControlFlow.queue} only tasks are assigned a priority and - * completed in ascending priority order. - * - * @name priorityQueue - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.queue]{@link module:ControlFlow.queue} - * @category Control Flow - * @param {Function} worker - An asynchronous function for processing a queued - * task, which must call its `callback(err)` argument when finished, with an - * optional `error` as an argument. If you want to handle errors from an - * individual task, pass a callback to `q.push()`. Invoked with - * (task, callback). - * @param {number} concurrency - An `integer` for determining how many `worker` - * functions should be run in parallel. If omitted, the concurrency defaults to - * `1`. If the concurrency is `0`, an error is thrown. - * @returns {module:ControlFlow.QueueObject} A priorityQueue object to manage the tasks. There are two - * differences between `queue` and `priorityQueue` objects: - * * `push(task, priority, [callback])` - `priority` should be a number. If an - * array of `tasks` is given, all tasks will be assigned the same priority. - * * The `unshift` method was removed. - */ -var priorityQueue = function (worker, concurrency) { - // Start with a normal queue - var q = queue$1(worker, concurrency); - - // Override push to accept second parameter representing priority - q.push = function (data, priority, callback) { - if (callback == null) callback = noop; - if (typeof callback !== 'function') { - throw new Error('task callback must be a function'); + function _queue(worker, concurrency, payload) { + if (concurrency == null) { + concurrency = 1; } - q.started = true; - if (!isArray(data)) { - data = [data]; + else if(concurrency === 0) { + throw new Error('Concurrency must not be zero'); } - if (data.length === 0) { - // call drain immediately if there are no tasks - return setImmediate$1(function () { - q.drain(); + function _insert(q, data, pos, callback) { + if (callback != null && typeof callback !== "function") { + throw new Error("task callback must be a function"); + } + q.started = true; + if (!_isArray(data)) { + data = [data]; + } + if(data.length === 0 && q.idle()) { + // call drain immediately if there are no tasks + return async.setImmediate(function() { + q.drain(); + }); + } + _arrayEach(data, function(task) { + var item = { + data: task, + callback: callback || noop + }; + + if (pos) { + q.tasks.unshift(item); + } else { + q.tasks.push(item); + } + + if (q.tasks.length === q.concurrency) { + q.saturated(); + } }); + async.setImmediate(q.process); } + function _next(q, tasks) { + return function(){ + workers -= 1; + + var removed = false; + var args = arguments; + _arrayEach(tasks, function (task) { + _arrayEach(workersList, function (worker, index) { + if (worker === task && !removed) { + workersList.splice(index, 1); + removed = true; + } + }); - priority = priority || 0; - var nextNode = q._tasks.head; - while (nextNode && priority >= nextNode.priority) { - nextNode = nextNode.next; + task.callback.apply(task, args); + }); + if (q.tasks.length + workers === 0) { + q.drain(); + } + q.process(); + }; } - for (var i = 0, l = data.length; i < l; i++) { - var item = { - data: data[i], - priority: priority, - callback: callback - }; + var workers = 0; + var workersList = []; + var q = { + tasks: [], + concurrency: concurrency, + payload: payload, + saturated: noop, + empty: noop, + drain: noop, + started: false, + paused: false, + push: function (data, callback) { + _insert(q, data, false, callback); + }, + kill: function () { + q.drain = noop; + q.tasks = []; + }, + unshift: function (data, callback) { + _insert(q, data, true, callback); + }, + process: function () { + while(!q.paused && workers < q.concurrency && q.tasks.length){ + + var tasks = q.payload ? + q.tasks.splice(0, q.payload) : + q.tasks.splice(0, q.tasks.length); + + var data = _map(tasks, function (task) { + return task.data; + }); - if (nextNode) { - q._tasks.insertBefore(nextNode, item); - } else { - q._tasks.push(item); + if (q.tasks.length === 0) { + q.empty(); + } + workers += 1; + workersList.push(tasks[0]); + var cb = only_once(_next(q, tasks)); + worker(data, cb); + } + }, + length: function () { + return q.tasks.length; + }, + running: function () { + return workers; + }, + workersList: function () { + return workersList; + }, + idle: function() { + return q.tasks.length + workers === 0; + }, + pause: function () { + q.paused = true; + }, + resume: function () { + if (q.paused === false) { return; } + q.paused = false; + var resumeCount = Math.min(q.concurrency, q.tasks.length); + // Need to call q.process once per concurrent + // worker to preserve full concurrency after pause + for (var w = 1; w <= resumeCount; w++) { + async.setImmediate(q.process); + } } - } - setImmediate$1(q.process); - }; + }; + return q; + } - // Remove unshift function - delete q.unshift; + async.queue = function (worker, concurrency) { + var q = _queue(function (items, cb) { + worker(items[0], cb); + }, concurrency, 1); - return q; -}; + return q; + }; -/** - * Runs the `tasks` array of functions in parallel, without waiting until the - * previous function has completed. Once any of the `tasks` complete or pass an - * error to its callback, the main `callback` is immediately called. It's - * equivalent to `Promise.race()`. - * - * @name race - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Array} tasks - An array containing functions to run. Each function - * is passed a `callback(err, result)` which it must call on completion with an - * error `err` (which can be `null`) and an optional `result` value. - * @param {Function} callback - A callback to run once any of the functions have - * completed. This function gets an error or result from the first function that - * completed. Invoked with (err, result). - * @returns undefined - * @example - * - * async.race([ - * function(callback) { - * setTimeout(function() { - * callback(null, 'one'); - * }, 200); - * }, - * function(callback) { - * setTimeout(function() { - * callback(null, 'two'); - * }, 100); - * } - * ], - * // main callback - * function(err, result) { - * // the result will be equal to 'two' as it finishes earlier - * }); - */ -function race(tasks, callback) { - callback = once(callback || noop); - if (!isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions')); - if (!tasks.length) return callback(); - for (var i = 0, l = tasks.length; i < l; i++) { - tasks[i](callback); - } -} + async.priorityQueue = function (worker, concurrency) { -var slice = Array.prototype.slice; + function _compareTasks(a, b){ + return a.priority - b.priority; + } -/** - * Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order. - * - * @name reduceRight - * @static - * @memberOf module:Collections - * @method - * @see [async.reduce]{@link module:Collections.reduce} - * @alias foldr - * @category Collection - * @param {Array} array - A collection to iterate over. - * @param {*} memo - The initial state of the reduction. - * @param {Function} iteratee - A function applied to each item in the - * array to produce the next step in the reduction. The `iteratee` is passed a - * `callback(err, reduction)` which accepts an optional error as its first - * argument, and the state of the reduction as the second. If an error is - * passed to the callback, the reduction is stopped and the main `callback` is - * immediately called with the error. Invoked with (memo, item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result is the reduced value. Invoked with - * (err, result). - */ -function reduceRight(array, memo, iteratee, callback) { - var reversed = slice.call(array).reverse(); - reduce(reversed, memo, iteratee, callback); -} - -/** - * Wraps the function in another function that always returns data even when it - * errors. - * - * The object returned has either the property `error` or `value`. - * - * @name reflect - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} fn - The function you want to wrap - * @returns {Function} - A function that always passes null to it's callback as - * the error. The second argument to the callback will be an `object` with - * either an `error` or a `value` property. - * @example - * - * async.parallel([ - * async.reflect(function(callback) { - * // do some stuff ... - * callback(null, 'one'); - * }), - * async.reflect(function(callback) { - * // do some more stuff but error ... - * callback('bad stuff happened'); - * }), - * async.reflect(function(callback) { - * // do some more stuff ... - * callback(null, 'two'); - * }) - * ], - * // optional callback - * function(err, results) { - * // values - * // results[0].value = 'one' - * // results[1].error = 'bad stuff happened' - * // results[2].value = 'two' - * }); - */ -function reflect(fn) { - return initialParams(function reflectOn(args, reflectCallback) { - args.push(baseRest$1(function callback(err, cbArgs) { - if (err) { - reflectCallback(null, { - error: err - }); - } else { - var value = null; - if (cbArgs.length === 1) { - value = cbArgs[0]; - } else if (cbArgs.length > 1) { - value = cbArgs; + function _binarySearch(sequence, item, compare) { + var beg = -1, + end = sequence.length - 1; + while (beg < end) { + var mid = beg + ((end - beg + 1) >>> 1); + if (compare(item, sequence[mid]) >= 0) { + beg = mid; + } else { + end = mid - 1; } - reflectCallback(null, { - value: value - }); } - })); - - return fn.apply(this, args); - }); -} + return beg; + } -function reject$1(eachfn, arr, iteratee, callback) { - _filter(eachfn, arr, function (value, cb) { - iteratee(value, function (err, v) { - if (err) { - cb(err); - } else { - cb(null, !v); + function _insert(q, data, priority, callback) { + if (callback != null && typeof callback !== "function") { + throw new Error("task callback must be a function"); } - }); - }, callback); -} + q.started = true; + if (!_isArray(data)) { + data = [data]; + } + if(data.length === 0) { + // call drain immediately if there are no tasks + return async.setImmediate(function() { + q.drain(); + }); + } + _arrayEach(data, function(task) { + var item = { + data: task, + priority: priority, + callback: typeof callback === 'function' ? callback : noop + }; -/** - * The opposite of [`filter`]{@link module:Collections.filter}. Removes values that pass an `async` truth test. - * - * @name reject - * @static - * @memberOf module:Collections - * @method - * @see [async.filter]{@link module:Collections.filter} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results). - * @example - * - * async.reject(['file1','file2','file3'], function(filePath, callback) { - * fs.access(filePath, function(err) { - * callback(null, !err) - * }); - * }, function(err, results) { - * // results now equals an array of missing files - * createFiles(results); - * }); - */ -var reject = doParallel(reject$1); + q.tasks.splice(_binarySearch(q.tasks, item, _compareTasks) + 1, 0, item); -/** - * A helper function that wraps an array or an object of functions with reflect. - * - * @name reflectAll - * @static - * @memberOf module:Utils - * @method - * @see [async.reflect]{@link module:Utils.reflect} - * @category Util - * @param {Array} tasks - The array of functions to wrap in `async.reflect`. - * @returns {Array} Returns an array of functions, each function wrapped in - * `async.reflect` - * @example - * - * let tasks = [ - * function(callback) { - * setTimeout(function() { - * callback(null, 'one'); - * }, 200); - * }, - * function(callback) { - * // do some more stuff but error ... - * callback(new Error('bad stuff happened')); - * }, - * function(callback) { - * setTimeout(function() { - * callback(null, 'two'); - * }, 100); - * } - * ]; - * - * async.parallel(async.reflectAll(tasks), - * // optional callback - * function(err, results) { - * // values - * // results[0].value = 'one' - * // results[1].error = Error('bad stuff happened') - * // results[2].value = 'two' - * }); - * - * // an example using an object instead of an array - * let tasks = { - * one: function(callback) { - * setTimeout(function() { - * callback(null, 'one'); - * }, 200); - * }, - * two: function(callback) { - * callback('two'); - * }, - * three: function(callback) { - * setTimeout(function() { - * callback(null, 'three'); - * }, 100); - * } - * }; - * - * async.parallel(async.reflectAll(tasks), - * // optional callback - * function(err, results) { - * // values - * // results.one.value = 'one' - * // results.two.error = 'two' - * // results.three.value = 'three' - * }); - */ -function reflectAll(tasks) { - var results; - if (isArray(tasks)) { - results = arrayMap(tasks, reflect); - } else { - results = {}; - baseForOwn(tasks, function (task, key) { - results[key] = reflect.call(this, task); - }); - } - return results; -} + if (q.tasks.length === q.concurrency) { + q.saturated(); + } + async.setImmediate(q.process); + }); + } -/** - * The same as [`reject`]{@link module:Collections.reject} but runs a maximum of `limit` async operations at a - * time. - * - * @name rejectLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.reject]{@link module:Collections.reject} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results). - */ -var rejectLimit = doParallelLimit(reject$1); + // Start with a normal queue + var q = async.queue(worker, concurrency); -/** - * The same as [`reject`]{@link module:Collections.reject} but runs only a single async operation at a time. - * - * @name rejectSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.reject]{@link module:Collections.reject} - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in `coll`. - * The `iteratee` is passed a `callback(err, truthValue)`, which must be called - * with a boolean argument once it has completed. Invoked with (item, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Invoked with (err, results). - */ -var rejectSeries = doLimit(rejectLimit, 1); + // Override push to accept second parameter representing priority + q.push = function (data, priority, callback) { + _insert(q, data, priority, callback); + }; -/** - * Attempts to get a successful response from `task` no more than `times` times - * before returning an error. If the task is successful, the `callback` will be - * passed the result of the successful task. If all attempts fail, the callback - * will be passed the error and result (if any) of the final attempt. - * - * @name retry - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - Can be either an - * object with `times` and `interval` or a number. - * * `times` - The number of attempts to make before giving up. The default - * is `5`. - * * `interval` - The time to wait between retries, in milliseconds. The - * default is `0`. The interval may also be specified as a function of the - * retry count (see example). - * * `errorFilter` - An optional synchronous function that is invoked on - * erroneous result. If it returns `true` the retry attempts will continue; - * if the function returns `false` the retry flow is aborted with the current - * attempt's error and result being returned to the final callback. - * Invoked with (err). - * * If `opts` is a number, the number specifies the number of times to retry, - * with the default interval of `0`. - * @param {Function} task - A function which receives two arguments: (1) a - * `callback(err, result)` which must be called when finished, passing `err` - * (which can be `null`) and the `result` of the function's execution, and (2) - * a `results` object, containing the results of the previously executed - * functions (if nested inside another control flow). Invoked with - * (callback, results). - * @param {Function} [callback] - An optional callback which is called when the - * task has succeeded, or after the final failed attempt. It receives the `err` - * and `result` arguments of the last attempt at completing the `task`. Invoked - * with (err, results). - * @example - * - * // The `retry` function can be used as a stand-alone control flow by passing - * // a callback, as shown below: - * - * // try calling apiMethod 3 times - * async.retry(3, apiMethod, function(err, result) { - * // do something with the result - * }); - * - * // try calling apiMethod 3 times, waiting 200 ms between each retry - * async.retry({times: 3, interval: 200}, apiMethod, function(err, result) { - * // do something with the result - * }); - * - * // try calling apiMethod 10 times with exponential backoff - * // (i.e. intervals of 100, 200, 400, 800, 1600, ... milliseconds) - * async.retry({ - * times: 10, - * interval: function(retryCount) { - * return 50 * Math.pow(2, retryCount); - * } - * }, apiMethod, function(err, result) { - * // do something with the result - * }); - * - * // try calling apiMethod the default 5 times no delay between each retry - * async.retry(apiMethod, function(err, result) { - * // do something with the result - * }); - * - * // try calling apiMethod only when error condition satisfies, all other - * // errors will abort the retry control flow and return to final callback - * async.retry({ - * errorFilter: function(err) { - * return err.message === 'Temporary error'; // only retry on a specific error - * } - * }, apiMethod, function(err, result) { - * // do something with the result - * }); - * - * // It can also be embedded within other control flow functions to retry - * // individual methods that are not as reliable, like this: - * async.auto({ - * users: api.getUsers.bind(api), - * payments: async.retry(3, api.getPayments.bind(api)) - * }, function(err, results) { - * // do something with the results - * }); - * - */ -function retry(opts, task, callback) { - var DEFAULT_TIMES = 5; - var DEFAULT_INTERVAL = 0; + // Remove unshift function + delete q.unshift; - var options = { - times: DEFAULT_TIMES, - intervalFunc: constant(DEFAULT_INTERVAL) + return q; }; - function parseTimes(acc, t) { - if (typeof t === 'object') { - acc.times = +t.times || DEFAULT_TIMES; - - acc.intervalFunc = typeof t.interval === 'function' ? t.interval : constant(+t.interval || DEFAULT_INTERVAL); - - acc.errorFilter = t.errorFilter; - } else if (typeof t === 'number' || typeof t === 'string') { - acc.times = +t || DEFAULT_TIMES; - } else { - throw new Error("Invalid arguments for async.retry"); - } - } - - if (arguments.length < 3 && typeof opts === 'function') { - callback = task || noop; - task = opts; - } else { - parseTimes(options, opts); - callback = callback || noop; - } + async.cargo = function (worker, payload) { + return _queue(worker, 1, payload); + }; - if (typeof task !== 'function') { - throw new Error("Invalid arguments for async.retry"); + function _console_fn(name) { + return _restParam(function (fn, args) { + fn.apply(null, args.concat([_restParam(function (err, args) { + if (typeof console === 'object') { + if (err) { + if (console.error) { + console.error(err); + } + } + else if (console[name]) { + _arrayEach(args, function (x) { + console[name](x); + }); + } + } + })])); + }); } - - var attempt = 1; - function retryAttempt() { - task(function (err) { - if (err && attempt++ < options.times && (typeof options.errorFilter != 'function' || options.errorFilter(err))) { - setTimeout(retryAttempt, options.intervalFunc(attempt)); - } else { - callback.apply(null, arguments); + async.log = _console_fn('log'); + async.dir = _console_fn('dir'); + /*async.info = _console_fn('info'); + async.warn = _console_fn('warn'); + async.error = _console_fn('error');*/ + + async.memoize = function (fn, hasher) { + var memo = {}; + var queues = {}; + var has = Object.prototype.hasOwnProperty; + hasher = hasher || identity; + var memoized = _restParam(function memoized(args) { + var callback = args.pop(); + var key = hasher.apply(null, args); + if (has.call(memo, key)) { + async.setImmediate(function () { + callback.apply(null, memo[key]); + }); + } + else if (has.call(queues, key)) { + queues[key].push(callback); + } + else { + queues[key] = [callback]; + fn.apply(null, args.concat([_restParam(function (args) { + memo[key] = args; + var q = queues[key]; + delete queues[key]; + for (var i = 0, l = q.length; i < l; i++) { + q[i].apply(null, args); + } + })])); } }); - } + memoized.memo = memo; + memoized.unmemoized = fn; + return memoized; + }; - retryAttempt(); -} + async.unmemoize = function (fn) { + return function () { + return (fn.unmemoized || fn).apply(null, arguments); + }; + }; -/** - * A close relative of [`retry`]{@link module:ControlFlow.retry}. This method wraps a task and makes it - * retryable, rather than immediately calling it with retries. - * - * @name retryable - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.retry]{@link module:ControlFlow.retry} - * @category Control Flow - * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - optional - * options, exactly the same as from `retry` - * @param {Function} task - the asynchronous function to wrap - * @returns {Functions} The wrapped function, which when invoked, will retry on - * an error, based on the parameters specified in `opts`. - * @example - * - * async.auto({ - * dep1: async.retryable(3, getFromFlakyService), - * process: ["dep1", async.retryable(3, function (results, cb) { - * maybeProcessData(results.dep1, cb); - * })] - * }, callback); - */ -var retryable = function (opts, task) { - if (!task) { - task = opts; - opts = null; + function _times(mapper) { + return function (count, iterator, callback) { + mapper(_range(count), iterator, callback); + }; } - return initialParams(function (args, callback) { - function taskFn(cb) { - task.apply(null, args.concat([cb])); - } - if (opts) retry(opts, taskFn, callback);else retry(taskFn, callback); - }); -}; - -/** - * Run the functions in the `tasks` collection in series, each one running once - * the previous function has completed. If any functions in the series pass an - * error to its callback, no more functions are run, and `callback` is - * immediately called with the value of the error. Otherwise, `callback` - * receives an array of results when `tasks` have completed. - * - * It is also possible to use an object instead of an array. Each property will - * be run as a function, and the results will be passed to the final `callback` - * as an object instead of an array. This can be a more readable way of handling - * results from {@link async.series}. - * - * **Note** that while many implementations preserve the order of object - * properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6) - * explicitly states that - * - * > The mechanics and order of enumerating the properties is not specified. - * - * So if you rely on the order in which your series of functions are executed, - * and want this to work on all platforms, consider using an array. - * - * @name series - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Array|Iterable|Object} tasks - A collection containing functions to run, each - * function is passed a `callback(err, result)` it must call on completion with - * an error `err` (which can be `null`) and an optional `result` value. - * @param {Function} [callback] - An optional callback to run once all the - * functions have completed. This function gets a results array (or object) - * containing all the result arguments passed to the `task` callbacks. Invoked - * with (err, result). - * @example - * async.series([ - * function(callback) { - * // do some stuff ... - * callback(null, 'one'); - * }, - * function(callback) { - * // do some more stuff ... - * callback(null, 'two'); - * } - * ], - * // optional callback - * function(err, results) { - * // results is now equal to ['one', 'two'] - * }); - * - * async.series({ - * one: function(callback) { - * setTimeout(function() { - * callback(null, 1); - * }, 200); - * }, - * two: function(callback){ - * setTimeout(function() { - * callback(null, 2); - * }, 100); - * } - * }, function(err, results) { - * // results is now equal to: {one: 1, two: 2} - * }); - */ -function series(tasks, callback) { - _parallel(eachOfSeries, tasks, callback); -} - -/** - * Returns `true` if at least one element in the `coll` satisfies an async test. - * If any iteratee call returns `true`, the main `callback` is immediately - * called. - * - * @name some - * @static - * @memberOf module:Collections - * @method - * @alias any - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in the array - * in parallel. The iteratee is passed a `callback(err, truthValue)` which must - * be called with a boolean argument once it has completed. Invoked with - * (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the iteratee functions have finished. - * Result will be either `true` or `false` depending on the values of the async - * tests. Invoked with (err, result). - * @example - * - * async.some(['file1','file2','file3'], function(filePath, callback) { - * fs.access(filePath, function(err) { - * callback(null, !err) - * }); - * }, function(err, result) { - * // if result is true then at least one of the files exists - * }); - */ -var some = _createTester(eachOf, Boolean, identity); + async.times = _times(async.map); + async.timesSeries = _times(async.mapSeries); + async.timesLimit = function (count, limit, iterator, callback) { + return async.mapLimit(_range(count), limit, iterator, callback); + }; -/** - * The same as [`some`]{@link module:Collections.some} but runs a maximum of `limit` async operations at a time. - * - * @name someLimit - * @static - * @memberOf module:Collections - * @method - * @see [async.some]{@link module:Collections.some} - * @alias anyLimit - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - A truth test to apply to each item in the array - * in parallel. The iteratee is passed a `callback(err, truthValue)` which must - * be called with a boolean argument once it has completed. Invoked with - * (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the iteratee functions have finished. - * Result will be either `true` or `false` depending on the values of the async - * tests. Invoked with (err, result). - */ -var someLimit = _createTester(eachOfLimit, Boolean, identity); + async.seq = function (/* functions... */) { + var fns = arguments; + return _restParam(function (args) { + var that = this; -/** - * The same as [`some`]{@link module:Collections.some} but runs only a single async operation at a time. - * - * @name someSeries - * @static - * @memberOf module:Collections - * @method - * @see [async.some]{@link module:Collections.some} - * @alias anySeries - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A truth test to apply to each item in the array - * in parallel. The iteratee is passed a `callback(err, truthValue)` which must - * be called with a boolean argument once it has completed. Invoked with - * (item, callback). - * @param {Function} [callback] - A callback which is called as soon as any - * iteratee returns `true`, or after all the iteratee functions have finished. - * Result will be either `true` or `false` depending on the values of the async - * tests. Invoked with (err, result). - */ -var someSeries = doLimit(someLimit, 1); + var callback = args[args.length - 1]; + if (typeof callback == 'function') { + args.pop(); + } else { + callback = noop; + } -/** - * Sorts a list by the results of running each `coll` value through an async - * `iteratee`. - * - * @name sortBy - * @static - * @memberOf module:Collections - * @method - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {Function} iteratee - A function to apply to each item in `coll`. - * The iteratee is passed a `callback(err, sortValue)` which must be called once - * it has completed with an error (which can be `null`) and a value to use as - * the sort criteria. Invoked with (item, callback). - * @param {Function} callback - A callback which is called after all the - * `iteratee` functions have finished, or an error occurs. Results is the items - * from the original `coll` sorted by the values returned by the `iteratee` - * calls. Invoked with (err, results). - * @example - * - * async.sortBy(['file1','file2','file3'], function(file, callback) { - * fs.stat(file, function(err, stats) { - * callback(err, stats.mtime); - * }); - * }, function(err, results) { - * // results is now the original array of files sorted by - * // modified date - * }); - * - * // By modifying the callback parameter the - * // sorting order can be influenced: - * - * // ascending order - * async.sortBy([1,9,3,5], function(x, callback) { - * callback(null, x); - * }, function(err,result) { - * // result callback - * }); - * - * // descending order - * async.sortBy([1,9,3,5], function(x, callback) { - * callback(null, x*-1); //<- x*-1 instead of x, turns the order around - * }, function(err,result) { - * // result callback - * }); - */ -function sortBy(coll, iteratee, callback) { - map(coll, function (x, callback) { - iteratee(x, function (err, criteria) { - if (err) return callback(err); - callback(null, { value: x, criteria: criteria }); + async.reduce(fns, args, function (newargs, fn, cb) { + fn.apply(that, newargs.concat([_restParam(function (err, nextargs) { + cb(err, nextargs); + })])); + }, + function (err, results) { + callback.apply(that, [err].concat(results)); + }); }); - }, function (err, results) { - if (err) return callback(err); - callback(null, arrayMap(results.sort(comparator), baseProperty('value'))); - }); + }; - function comparator(left, right) { - var a = left.criteria, - b = right.criteria; - return a < b ? -1 : a > b ? 1 : 0; - } -} + async.compose = function (/* functions... */) { + return async.seq.apply(null, Array.prototype.reverse.call(arguments)); + }; -/** - * Sets a time limit on an asynchronous function. If the function does not call - * its callback within the specified milliseconds, it will be called with a - * timeout error. The code property for the error object will be `'ETIMEDOUT'`. - * - * @name timeout - * @static - * @memberOf module:Utils - * @method - * @category Util - * @param {Function} asyncFn - The asynchronous function you want to set the - * time limit. - * @param {number} milliseconds - The specified time limit. - * @param {*} [info] - Any variable you want attached (`string`, `object`, etc) - * to timeout Error for more information.. - * @returns {Function} Returns a wrapped function that can be used with any of - * the control flow functions. Invoke this function with the same - * parameters as you would `asyncFunc`. - * @example - * - * function myFunction(foo, callback) { - * doAsyncTask(foo, function(err, data) { - * // handle errors - * if (err) return callback(err); - * - * // do some stuff ... - * - * // return processed data - * return callback(null, data); - * }); - * } - * - * var wrapped = async.timeout(myFunction, 1000); - * - * // call `wrapped` as you would `myFunction` - * wrapped({ bar: 'bar' }, function(err, data) { - * // if `myFunction` takes < 1000 ms to execute, `err` - * // and `data` will have their expected values - * - * // else `err` will be an Error with the code 'ETIMEDOUT' - * }); - */ -function timeout(asyncFn, milliseconds, info) { - var originalCallback, timer; - var timedOut = false; - - function injectedCallback() { - if (!timedOut) { - originalCallback.apply(null, arguments); - clearTimeout(timer); - } - } - function timeoutCallback() { - var name = asyncFn.name || 'anonymous'; - var error = new Error('Callback function "' + name + '" timed out.'); - error.code = 'ETIMEDOUT'; - if (info) { - error.info = info; - } - timedOut = true; - originalCallback(error); + function _applyEach(eachfn) { + return _restParam(function(fns, args) { + var go = _restParam(function(args) { + var that = this; + var callback = args.pop(); + return eachfn(fns, function (fn, _, cb) { + fn.apply(that, args.concat([cb])); + }, + callback); + }); + if (args.length) { + return go.apply(this, args); + } + else { + return go; + } + }); } - return initialParams(function (args, origCallback) { - originalCallback = origCallback; - // setup timer and call original function - timer = setTimeout(timeoutCallback, milliseconds); - asyncFn.apply(null, args.concat(injectedCallback)); - }); -} + async.applyEach = _applyEach(async.eachOf); + async.applyEachSeries = _applyEach(async.eachOfSeries); -/* Built-in method references for those with the same name as other `lodash` methods. */ -var nativeCeil = Math.ceil; -var nativeMax$1 = Math.max; -/** - * The base implementation of `_.range` and `_.rangeRight` which doesn't - * coerce arguments. - * - * @private - * @param {number} start The start of the range. - * @param {number} end The end of the range. - * @param {number} step The value to increment or decrement by. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Array} Returns the range of numbers. - */ -function baseRange(start, end, step, fromRight) { - var index = -1, - length = nativeMax$1(nativeCeil((end - start) / (step || 1)), 0), - result = Array(length); - - while (length--) { - result[fromRight ? length : ++index] = start; - start += step; - } - return result; -} - -/** - * The same as [times]{@link module:ControlFlow.times} but runs a maximum of `limit` async operations at a - * time. - * - * @name timesLimit - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.times]{@link module:ControlFlow.times} - * @category Control Flow - * @param {number} count - The number of times to run the function. - * @param {number} limit - The maximum number of async operations at a time. - * @param {Function} iteratee - The function to call `n` times. Invoked with the - * iteration index and a callback (n, next). - * @param {Function} callback - see [async.map]{@link module:Collections.map}. - */ -function timeLimit(count, limit, iteratee, callback) { - mapLimit(baseRange(0, count, 1), limit, iteratee, callback); -} - -/** - * Calls the `iteratee` function `n` times, and accumulates results in the same - * manner you would use with [map]{@link module:Collections.map}. - * - * @name times - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.map]{@link module:Collections.map} - * @category Control Flow - * @param {number} n - The number of times to run the function. - * @param {Function} iteratee - The function to call `n` times. Invoked with the - * iteration index and a callback (n, next). - * @param {Function} callback - see {@link module:Collections.map}. - * @example - * - * // Pretend this is some complicated async factory - * var createUser = function(id, callback) { - * callback(null, { - * id: 'user' + id - * }); - * }; - * - * // generate 5 users - * async.times(5, function(n, next) { - * createUser(n, function(err, user) { - * next(err, user); - * }); - * }, function(err, users) { - * // we should now have 5 users - * }); - */ -var times = doLimit(timeLimit, Infinity); - -/** - * The same as [times]{@link module:ControlFlow.times} but runs only a single async operation at a time. - * - * @name timesSeries - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.times]{@link module:ControlFlow.times} - * @category Control Flow - * @param {number} n - The number of times to run the function. - * @param {Function} iteratee - The function to call `n` times. Invoked with the - * iteration index and a callback (n, next). - * @param {Function} callback - see {@link module:Collections.map}. - */ -var timesSeries = doLimit(timeLimit, 1); + async.forever = function (fn, callback) { + var done = only_once(callback || noop); + var task = ensureAsync(fn); + function next(err) { + if (err) { + return done(err); + } + task(next); + } + next(); + }; -/** - * A relative of `reduce`. Takes an Object or Array, and iterates over each - * element in series, each step potentially mutating an `accumulator` value. - * The type of the accumulator defaults to the type of collection passed in. - * - * @name transform - * @static - * @memberOf module:Collections - * @method - * @category Collection - * @param {Array|Iterable|Object} coll - A collection to iterate over. - * @param {*} [accumulator] - The initial state of the transform. If omitted, - * it will default to an empty Object or Array, depending on the type of `coll` - * @param {Function} iteratee - A function applied to each item in the - * collection that potentially modifies the accumulator. The `iteratee` is - * passed a `callback(err)` which accepts an optional error as its first - * argument. If an error is passed to the callback, the transform is stopped - * and the main `callback` is immediately called with the error. - * Invoked with (accumulator, item, key, callback). - * @param {Function} [callback] - A callback which is called after all the - * `iteratee` functions have finished. Result is the transformed accumulator. - * Invoked with (err, result). - * @example - * - * async.transform([1,2,3], function(acc, item, index, callback) { - * // pointless async: - * process.nextTick(function() { - * acc.push(item * 2) - * callback(null) - * }); - * }, function(err, result) { - * // result is now equal to [2, 4, 6] - * }); - * - * @example - * - * async.transform({a: 1, b: 2, c: 3}, function (obj, val, key, callback) { - * setImmediate(function () { - * obj[key] = val * 2; - * callback(); - * }) - * }, function (err, result) { - * // result is equal to {a: 2, b: 4, c: 6} - * }) - */ -function transform(coll, accumulator, iteratee, callback) { - if (arguments.length === 3) { - callback = iteratee; - iteratee = accumulator; - accumulator = isArray(coll) ? [] : {}; + function ensureAsync(fn) { + return _restParam(function (args) { + var callback = args.pop(); + args.push(function () { + var innerArgs = arguments; + if (sync) { + async.setImmediate(function () { + callback.apply(null, innerArgs); + }); + } else { + callback.apply(null, innerArgs); + } + }); + var sync = true; + fn.apply(this, args); + sync = false; + }); } - callback = once(callback || noop); - - eachOf(coll, function (v, k, cb) { - iteratee(accumulator, v, k, cb); - }, function (err) { - callback(err, accumulator); - }); -} -/** - * Undoes a [memoize]{@link module:Utils.memoize}d function, reverting it to the original, - * unmemoized form. Handy for testing. - * - * @name unmemoize - * @static - * @memberOf module:Utils - * @method - * @see [async.memoize]{@link module:Utils.memoize} - * @category Util - * @param {Function} fn - the memoized function - * @returns {Function} a function that calls the original unmemoized function - */ -function unmemoize(fn) { - return function () { - return (fn.unmemoized || fn).apply(null, arguments); - }; -} + async.ensureAsync = ensureAsync; -/** - * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when - * stopped, or an error occurs. - * - * @name whilst - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Function} test - synchronous truth test to perform before each - * execution of `iteratee`. Invoked with (). - * @param {Function} iteratee - A function which is called each time `test` passes. - * The function is passed a `callback(err)`, which must be called once it has - * completed with an optional `err` argument. Invoked with (callback). - * @param {Function} [callback] - A callback which is called after the test - * function has failed and repeated execution of `iteratee` has stopped. `callback` - * will be passed an error and any arguments passed to the final `iteratee`'s - * callback. Invoked with (err, [results]); - * @returns undefined - * @example - * - * var count = 0; - * async.whilst( - * function() { return count < 5; }, - * function(callback) { - * count++; - * setTimeout(function() { - * callback(null, count); - * }, 1000); - * }, - * function (err, n) { - * // 5 seconds have passed, n = 5 - * } - * ); - */ -function whilst(test, iteratee, callback) { - callback = onlyOnce(callback || noop); - if (!test()) return callback(null); - var next = baseRest$1(function (err, args) { - if (err) return callback(err); - if (test()) return iteratee(next); - callback.apply(null, [null].concat(args)); + async.constant = _restParam(function(values) { + var args = [null].concat(values); + return function (callback) { + return callback.apply(this, args); + }; }); - iteratee(next); -} -/** - * Repeatedly call `fn` until `test` returns `true`. Calls `callback` when - * stopped, or an error occurs. `callback` will be passed an error and any - * arguments passed to the final `fn`'s callback. - * - * The inverse of [whilst]{@link module:ControlFlow.whilst}. - * - * @name until - * @static - * @memberOf module:ControlFlow - * @method - * @see [async.whilst]{@link module:ControlFlow.whilst} - * @category Control Flow - * @param {Function} test - synchronous truth test to perform before each - * execution of `fn`. Invoked with (). - * @param {Function} fn - A function which is called each time `test` fails. - * The function is passed a `callback(err)`, which must be called once it has - * completed with an optional `err` argument. Invoked with (callback). - * @param {Function} [callback] - A callback which is called after the test - * function has passed and repeated execution of `fn` has stopped. `callback` - * will be passed an error and any arguments passed to the final `fn`'s - * callback. Invoked with (err, [results]); - */ -function until(test, fn, callback) { - whilst(function () { - return !test.apply(this, arguments); - }, fn, callback); -} - -/** - * Runs the `tasks` array of functions in series, each passing their results to - * the next in the array. However, if any of the `tasks` pass an error to their - * own callback, the next function is not executed, and the main `callback` is - * immediately called with the error. - * - * @name waterfall - * @static - * @memberOf module:ControlFlow - * @method - * @category Control Flow - * @param {Array} tasks - An array of functions to run, each function is passed - * a `callback(err, result1, result2, ...)` it must call on completion. The - * first argument is an error (which can be `null`) and any further arguments - * will be passed as arguments in order to the next task. - * @param {Function} [callback] - An optional callback to run once all the - * functions have completed. This will be passed the results of the last task's - * callback. Invoked with (err, [results]). - * @returns undefined - * @example - * - * async.waterfall([ - * function(callback) { - * callback(null, 'one', 'two'); - * }, - * function(arg1, arg2, callback) { - * // arg1 now equals 'one' and arg2 now equals 'two' - * callback(null, 'three'); - * }, - * function(arg1, callback) { - * // arg1 now equals 'three' - * callback(null, 'done'); - * } - * ], function (err, result) { - * // result now equals 'done' - * }); - * - * // Or, with named functions: - * async.waterfall([ - * myFirstFunction, - * mySecondFunction, - * myLastFunction, - * ], function (err, result) { - * // result now equals 'done' - * }); - * function myFirstFunction(callback) { - * callback(null, 'one', 'two'); - * } - * function mySecondFunction(arg1, arg2, callback) { - * // arg1 now equals 'one' and arg2 now equals 'two' - * callback(null, 'three'); - * } - * function myLastFunction(arg1, callback) { - * // arg1 now equals 'three' - * callback(null, 'done'); - * } - */ -var waterfall = function (tasks, callback) { - callback = once(callback || noop); - if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions')); - if (!tasks.length) return callback(); - var taskIndex = 0; - - function nextTask(args) { - if (taskIndex === tasks.length) { - return callback.apply(null, [null].concat(args)); - } - - var taskCallback = onlyOnce(baseRest$1(function (err, args) { - if (err) { - return callback.apply(null, [err].concat(args)); + async.wrapSync = + async.asyncify = function asyncify(func) { + return _restParam(function (args) { + var callback = args.pop(); + var result; + try { + result = func.apply(this, args); + } catch (e) { + return callback(e); } - nextTask(args); - })); - - args.push(taskCallback); + // if result is Promise object + if (_isObject(result) && typeof result.then === "function") { + result.then(function(value) { + callback(null, value); + })["catch"](function(err) { + callback(err.message ? err : new Error(err)); + }); + } else { + callback(null, result); + } + }); + }; - var task = tasks[taskIndex++]; - task.apply(null, args); + // Node.js + if (typeof module === 'object' && module.exports) { + module.exports = async; + } + // AMD / RequireJS + else if (typeof define === 'function' && define.amd) { + define([], function () { + return async; + }); + } + // included directly via <script> tag + else { + root.async = async; } - nextTask([]); -}; - -/** - * Async is a utility module which provides straight-forward, powerful functions - * for working with asynchronous JavaScript. Although originally designed for - * use with [Node.js](http://nodejs.org) and installable via - * `npm install --save async`, it can also be used directly in the browser. - * @module async - */ - -/** - * A collection of `async` functions for manipulating collections, such as - * arrays and objects. - * @module Collections - */ - -/** - * A collection of `async` functions for controlling the flow through a script. - * @module ControlFlow - */ - -/** - * A collection of `async` utility functions. - * @module Utils - */ -var index = { - applyEach: applyEach, - applyEachSeries: applyEachSeries, - apply: apply$2, - asyncify: asyncify, - auto: auto, - autoInject: autoInject, - cargo: cargo, - compose: compose, - concat: concat, - concatSeries: concatSeries, - constant: constant$2, - detect: detect, - detectLimit: detectLimit, - detectSeries: detectSeries, - dir: dir, - doDuring: doDuring, - doUntil: doUntil, - doWhilst: doWhilst, - during: during, - each: eachLimit, - eachLimit: eachLimit$1, - eachOf: eachOf, - eachOfLimit: eachOfLimit, - eachOfSeries: eachOfSeries, - eachSeries: eachSeries, - ensureAsync: ensureAsync, - every: every, - everyLimit: everyLimit, - everySeries: everySeries, - filter: filter, - filterLimit: filterLimit, - filterSeries: filterSeries, - forever: forever, - log: log, - map: map, - mapLimit: mapLimit, - mapSeries: mapSeries, - mapValues: mapValues, - mapValuesLimit: mapValuesLimit, - mapValuesSeries: mapValuesSeries, - memoize: memoize, - nextTick: nextTick, - parallel: parallelLimit, - parallelLimit: parallelLimit$1, - priorityQueue: priorityQueue, - queue: queue$1, - race: race, - reduce: reduce, - reduceRight: reduceRight, - reflect: reflect, - reflectAll: reflectAll, - reject: reject, - rejectLimit: rejectLimit, - rejectSeries: rejectSeries, - retry: retry, - retryable: retryable, - seq: seq$1, - series: series, - setImmediate: setImmediate$1, - some: some, - someLimit: someLimit, - someSeries: someSeries, - sortBy: sortBy, - timeout: timeout, - times: times, - timesLimit: timeLimit, - timesSeries: timesSeries, - transform: transform, - unmemoize: unmemoize, - until: until, - waterfall: waterfall, - whilst: whilst, - - // aliases - all: every, - any: some, - forEach: eachLimit, - forEachSeries: eachSeries, - forEachLimit: eachLimit$1, - forEachOf: eachOf, - forEachOfSeries: eachOfSeries, - forEachOfLimit: eachOfLimit, - inject: reduce, - foldl: reduce, - foldr: reduceRight, - select: filter, - selectLimit: filterLimit, - selectSeries: filterSeries, - wrapSync: asyncify -}; - -exports['default'] = index; -exports.applyEach = applyEach; -exports.applyEachSeries = applyEachSeries; -exports.apply = apply$2; -exports.asyncify = asyncify; -exports.auto = auto; -exports.autoInject = autoInject; -exports.cargo = cargo; -exports.compose = compose; -exports.concat = concat; -exports.concatSeries = concatSeries; -exports.constant = constant$2; -exports.detect = detect; -exports.detectLimit = detectLimit; -exports.detectSeries = detectSeries; -exports.dir = dir; -exports.doDuring = doDuring; -exports.doUntil = doUntil; -exports.doWhilst = doWhilst; -exports.during = during; -exports.each = eachLimit; -exports.eachLimit = eachLimit$1; -exports.eachOf = eachOf; -exports.eachOfLimit = eachOfLimit; -exports.eachOfSeries = eachOfSeries; -exports.eachSeries = eachSeries; -exports.ensureAsync = ensureAsync; -exports.every = every; -exports.everyLimit = everyLimit; -exports.everySeries = everySeries; -exports.filter = filter; -exports.filterLimit = filterLimit; -exports.filterSeries = filterSeries; -exports.forever = forever; -exports.log = log; -exports.map = map; -exports.mapLimit = mapLimit; -exports.mapSeries = mapSeries; -exports.mapValues = mapValues; -exports.mapValuesLimit = mapValuesLimit; -exports.mapValuesSeries = mapValuesSeries; -exports.memoize = memoize; -exports.nextTick = nextTick; -exports.parallel = parallelLimit; -exports.parallelLimit = parallelLimit$1; -exports.priorityQueue = priorityQueue; -exports.queue = queue$1; -exports.race = race; -exports.reduce = reduce; -exports.reduceRight = reduceRight; -exports.reflect = reflect; -exports.reflectAll = reflectAll; -exports.reject = reject; -exports.rejectLimit = rejectLimit; -exports.rejectSeries = rejectSeries; -exports.retry = retry; -exports.retryable = retryable; -exports.seq = seq$1; -exports.series = series; -exports.setImmediate = setImmediate$1; -exports.some = some; -exports.someLimit = someLimit; -exports.someSeries = someSeries; -exports.sortBy = sortBy; -exports.timeout = timeout; -exports.times = times; -exports.timesLimit = timeLimit; -exports.timesSeries = timesSeries; -exports.transform = transform; -exports.unmemoize = unmemoize; -exports.until = until; -exports.waterfall = waterfall; -exports.whilst = whilst; -exports.all = every; -exports.allLimit = everyLimit; -exports.allSeries = everySeries; -exports.any = some; -exports.anyLimit = someLimit; -exports.anySeries = someSeries; -exports.find = detect; -exports.findLimit = detectLimit; -exports.findSeries = detectSeries; -exports.forEach = eachLimit; -exports.forEachSeries = eachSeries; -exports.forEachLimit = eachLimit$1; -exports.forEachOf = eachOf; -exports.forEachOfSeries = eachOfSeries; -exports.forEachOfLimit = eachOfLimit; -exports.inject = reduce; -exports.foldl = reduce; -exports.foldr = reduceRight; -exports.select = filter; -exports.selectLimit = filterLimit; -exports.selectSeries = filterSeries; -exports.wrapSync = asyncify; - -Object.defineProperty(exports, '__esModule', { value: true }); - -}))); +}()); |