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node_modules/es5-ext/math/tanh/shim.js 330 Bytes
f7563de62   Palak Handa   first commit
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  'use strict';
  
  var exp = Math.exp;
  
  module.exports = function (x) {
  	var a, b;
  	if (isNaN(x)) return NaN;
  	x = Number(x);
  	if (x === 0) return x;
  	if (x === Infinity) return 1;
  	if (x === -Infinity) return -1;
  	a = exp(x);
  	if (a === Infinity) return 1;
  	b = exp(-x);
  	if (b === Infinity) return -1;
  	return (a - b) / (a + b);
  };