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17 lines
343 B
17 lines
343 B
10 years ago
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// Thanks: https://github.com/monolithed/ECMAScript-6
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'use strict';
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var exp = Math.exp;
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module.exports = function (x) {
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if (isNaN(x)) return NaN;
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x = Number(x);
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if (x === 0) return x;
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if (x === Infinity) return Infinity;
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if (x === -Infinity) return -1;
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if ((x > -1.0e-6) && (x < 1.0e-6)) return x + x * x / 2;
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return exp(x) - 1;
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};
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