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author | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
commit | d1291f67551c58168af43698a359cb5ddfd266b0 (patch) | |
tree | 55a13ed29fe1915e3f42f1b1b7038dafa2e975a7 /node_modules/lodash/_createRound.js | |
parent | d0a0695fb5d34996850723f7d4b1b59c3df909c2 (diff) | |
download | wallet-core-d1291f67551c58168af43698a359cb5ddfd266b0.tar.xz |
node_modules
Diffstat (limited to 'node_modules/lodash/_createRound.js')
-rw-r--r-- | node_modules/lodash/_createRound.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/node_modules/lodash/_createRound.js b/node_modules/lodash/_createRound.js new file mode 100644 index 000000000..74b20d408 --- /dev/null +++ b/node_modules/lodash/_createRound.js @@ -0,0 +1,33 @@ +var toInteger = require('./toInteger'), + toNumber = require('./toNumber'), + toString = require('./toString'); + +/* Built-in method references for those with the same name as other `lodash` methods. */ +var nativeMin = Math.min; + +/** + * Creates a function like `_.round`. + * + * @private + * @param {string} methodName The name of the `Math` method to use when rounding. + * @returns {Function} Returns the new round function. + */ +function createRound(methodName) { + var func = Math[methodName]; + return function(number, precision) { + number = toNumber(number); + precision = nativeMin(toInteger(precision), 292); + if (precision) { + // Shift with exponential notation to avoid floating-point issues. + // See [MDN](https://mdn.io/round#Examples) for more details. + var pair = (toString(number) + 'e').split('e'), + value = func(pair[0] + 'e' + (+pair[1] + precision)); + + pair = (toString(value) + 'e').split('e'); + return +(pair[0] + 'e' + (+pair[1] - precision)); + } + return func(number); + }; +} + +module.exports = createRound; |