BJ_web_developers / dyitoc

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node_modules/es5-ext/math/acosh/shim.js 289 Bytes
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aaac7fed   liuqimichale   add 
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  "use strict";
  
  var log = Math.log, sqrt = Math.sqrt;
  
  module.exports = function (value) {
  	if (isNaN(value)) return NaN;
  	value = Number(value);
  	if (value < 1) return NaN;
  	if (value === 1) return 0;
  	if (value === Infinity) return value;
  	return log(value + sqrt(value * value - 1));
  };