isEmpty.js

/**	isEmpty(varried)
 *	Simple method for testing if item is "empty"
 **/
;(function() {
	/**
	 *	!a				Basic empty check. Takes care of 90% of items passed through.
	 *	0 >= a			Catchs '0' strings and empty Arrays
	 *
	 *	/\{\}/.test(JSON.stringify(a).replace(/"[^"]*":(0|"0*"|false|null|\{\}|\[(null(,)?)*\]),?/g, '').replace(/"[^"]*":\{\},?/g, ''))	//	to determine Blank Object
	 *	/|\[(null(,)*)*\]/.test(JSON.stringify(a).replace(/(0|"0*"|false|null|\{\}|\[(null(,)?)*\]),?/g, ''))								//	to determine Blank Array
	 **/
	function isEmpty(a) {
		if (!a || 0 >= a) return !0;
		if ("object" == typeof a) {
			var b = JSON.stringify(a).replace(/"[^"]*":(0|"0*"|false|null|\{\}|\[(null(,)?)*\]),?/g, '').replace(/"[^"]*":\{\},?/g, '');
			if ( /^$|\{\}|\[\]/.test(b) ) return !0;
			else if (a instanceof Array)  {
				b = b.replace(/(0|"0*"|false|null|\{\}|\[(null(,)?)*\]),?/g, '');
				if ( /^$|\{\}|\[\]/.test(b) ) return !0;
			}
		}
		return false;
	}
	window.hasOwnProperty("empty")||(window.empty=isEmpty);
})();