Clone (a.k.a. create singleton) for String object

string.js

/*jshint strict:false */

/*
 * @function
 * @namespace String.prototype
 * @name clone
 * 
 * @description Clone (a.k.a. create singleton) of String object
 * This method allows to resolve issue with variable's referencing
 * See performance here: http://jsperf.com/clone-create-singleton-for-string-object
 * 
 * @param {boolean} asObject - If true returns String object, if false returns literal
 * 
 * @example
 * var str = new String('abc');
 * var str2 - str.clone();
 * str = new String('cde');
 * console.log(str2); //-> 'abc'
 */
Object.defineProperty(String.prototype, 'clone', {
	value: function(asObject){ return (asObject) ? new String(this.toString()) : (new String(this.toString())).toString(); }
});