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- "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;
- };
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