mirror of
https://github.com/mgerb/mywebsite
synced 2026-01-12 10:52:47 +00:00
18 lines
385 B
JavaScript
18 lines
385 B
JavaScript
// Thanks: https://github.com/monolithed/ECMAScript-6/blob/master/ES6.js
|
|
|
|
'use strict';
|
|
|
|
var log = Math.log;
|
|
|
|
module.exports = function (x) {
|
|
if (isNaN(x)) return NaN;
|
|
x = Number(x);
|
|
if (x < -1) return NaN;
|
|
if (x === -1) return -Infinity;
|
|
if (x === 0) return x;
|
|
if (x === Infinity) return Infinity;
|
|
|
|
if (x > -1.0e-8 && x < 1.0e-8) return (x - x * x / 2);
|
|
return log(1 + x);
|
|
};
|