compound-ex4
Version:
Compound-ex4 - MVC framework for NodeJS (ExpressJs 4 version), fork compoundjs(https://github.com/1602/compound)
17 lines (12 loc) • 343 B
JavaScript
// Thanks: https://github.com/monolithed/ECMAScript-6
;
var exp = Math.exp;
module.exports = function (x) {
if (isNaN(x)) return NaN;
x = Number(x);
if (x === 0) return x;
if (x === Infinity) return Infinity;
if (x === -Infinity) return -1;
if ((x > -1.0e-6) && (x < 1.0e-6)) return x + x * x / 2;
return exp(x) - 1;
};