refactor start

home/ags/node_modules/is-symbol/index.js

@@ -1,35 +0,0 @@
-'use strict';
-
-var toStr = Object.prototype.toString;
-var hasSymbols = require('has-symbols')();
-
-if (hasSymbols) {
-	var symToStr = Symbol.prototype.toString;
-	var symStringRegex = /^Symbol\(.*\)$/;
-	var isSymbolObject = function isRealSymbolObject(value) {
-		if (typeof value.valueOf() !== 'symbol') {
-			return false;
-		}
-		return symStringRegex.test(symToStr.call(value));
-	};
-
-	module.exports = function isSymbol(value) {
-		if (typeof value === 'symbol') {
-			return true;
-		}
-		if (toStr.call(value) !== '[object Symbol]') {
-			return false;
-		}
-		try {
-			return isSymbolObject(value);
-		} catch (e) {
-			return false;
-		}
-	};
-} else {
-
-	module.exports = function isSymbol(value) {
-		// this environment does not support Symbols.
-		return false && value;
-	};
-}