chushihua

node_modules/es5-ext/math/tanh/shim.js

@@ -0,0 +1,17 @@
+"use strict";
+
+var exp = Math.exp;
+
+module.exports = function (value) {
+	var num1, num2;
+	if (isNaN(value)) return NaN;
+	value = Number(value);
+	if (value === 0) return value;
+	if (value === Infinity) return 1;
+	if (value === -Infinity) return -1;
+	num1 = exp(value);
+	if (num1 === Infinity) return 1;
+	num2 = exp(-value);
+	if (num2 === Infinity) return -1;
+	return (num1 - num2) / (num1 + num2);
+};