aaac7fed
 liuqimichale
add
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// Thanks: https://github.com/monolithed/ECMAScript-6/blob/master/ES6.js
"use strict";
var log = Math.log;
module.exports = function (value) {
if (isNaN(value)) return NaN;
value = Number(value);
if (value < -1) return NaN;
if (value === -1) return -Infinity;
if (value === 0) return value;
if (value === Infinity) return Infinity;
if (value > -1.0e-8 && value < 1.0e-8) return value - value * value / 2;
return log(1 + value);
};
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