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Rich Trott
d7aa8fa088
Update ESLint to 2.1.0. ESLint has a number of potentially-useful new features but this change attempts to be minimal in its changes. However, some things could not be avoided reasonably. ESLint 2.1.0 found a few lint issues that ESLing 1.x missed with template strings that did not take advantage of any features of template strings, and `let` declarations where `const` sufficed. Additionally, ESLint 2.1.0 removes some granularity around enabling ES6 features. Some features (e.g., spread operator) that had been turned off in our configuration for ESLint 1.x are now permitted. PR-URL: https://github.com/nodejs/node/pull/5214 Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: jbergstroem - Johan Bergström <bugs@bergstroem.nu> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Myles Borins <myles.borins@gmail.com>
31 lines
944 B
JavaScript
31 lines
944 B
JavaScript
var toInteger = require('./toInteger'),
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toNumber = require('./toNumber'),
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toString = require('./toString');
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/**
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* Creates a function like `_.round`.
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*
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* @private
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* @param {string} methodName The name of the `Math` method to use when rounding.
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* @returns {Function} Returns the new round function.
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*/
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function createRound(methodName) {
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var func = Math[methodName];
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return function(number, precision) {
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number = toNumber(number);
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precision = toInteger(precision);
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if (precision) {
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// Shift with exponential notation to avoid floating-point issues.
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// See [MDN](https://mdn.io/round#Examples) for more details.
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var pair = (toString(number) + 'e').split('e'),
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value = func(pair[0] + 'e' + (+pair[1] + precision));
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pair = (toString(value) + 'e').split('e');
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return +(pair[0] + 'e' + (+pair[1] - precision));
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}
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return func(number);
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};
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}
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module.exports = createRound;
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