You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
15 lines
313 B
15 lines
313 B
4 years ago
|
"use strict";
|
||
|
|
||
|
var log = Math.log, LOG2E = Math.LOG2E;
|
||
|
|
||
|
module.exports = function (value) {
|
||
|
if (isNaN(value)) return NaN;
|
||
|
value = Number(value);
|
||
|
if (value < 0) return NaN;
|
||
|
if (value === 0) return -Infinity;
|
||
|
if (value === 1) return 0;
|
||
|
if (value === Infinity) return Infinity;
|
||
|
|
||
|
return log(value) * LOG2E;
|
||
|
};
|