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author | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
commit | de98e0b232509d5f40c135d540a70e415272ff85 (patch) | |
tree | a79222a5b58484ab3b80d18efcaaa7ccc4769b33 /node_modules/fbjs/lib/flatMapArray.js.flow | |
parent | e0c9d480a73fa629c1e4a47d3e721f1d2d345406 (diff) |
node_modules
Diffstat (limited to 'node_modules/fbjs/lib/flatMapArray.js.flow')
-rw-r--r-- | node_modules/fbjs/lib/flatMapArray.js.flow | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/node_modules/fbjs/lib/flatMapArray.js.flow b/node_modules/fbjs/lib/flatMapArray.js.flow new file mode 100644 index 000000000..91f16fbcf --- /dev/null +++ b/node_modules/fbjs/lib/flatMapArray.js.flow @@ -0,0 +1,36 @@ +/** + * Copyright (c) 2013-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under the BSD-style license found in the + * LICENSE file in the root directory of this source tree. An additional grant + * of patent rights can be found in the PATENTS file in the same directory. + * + * @providesModule flatMapArray + * @typechecks + */ + +var push = Array.prototype.push; + +/** + * Applies a function to every item in an array and concatenates the resulting + * arrays into a single flat array. + * + * @param {array} array + * @param {function} fn + * @return {array} + */ +function flatMapArray(array, fn) { + var ret = []; + for (var ii = 0; ii < array.length; ii++) { + var result = fn.call(array, array[ii], ii); + if (Array.isArray(result)) { + push.apply(ret, result); + } else if (result != null) { + throw new TypeError('flatMapArray: Callback must return an array or null, ' + 'received "' + result + '" instead'); + } + } + return ret; +} + +module.exports = flatMapArray;
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