git.r.bdr.sh - rbdr/dotfiles/blob

   1 // Thanks: https://github.com/monolithed/ECMAScript-6
   2
   3 'use strict';
   4
   5 var exp = Math.exp;
   6
   7 module.exports = function (x) {
   8         if (isNaN(x)) return NaN;
   9         x = Number(x);
  10         if (x === 0) return x;
  11         if (x === Infinity) return Infinity;
  12         if (x === -Infinity) return -1;
  13
  14         if ((x > -1.0e-6) && (x < 1.0e-6)) return x + x * x / 2;
  15         return exp(x) - 1;
  16 };