Collection Native

Collection.js

function Collection(list){
	this.list = $splat(list || []);
	this.length = this.list.length;
};

new Native({name: 'Collection', initialize: Collection, generics: false});

(function() {

// Some browsers don't iterate over natives, so brute force is required.
var natives = ["indexOf", "join", "lastIndexOf", "pop", "push", "reverse", "shift", "slice", "sort", "splice", "unshift"];
natives.each(function(item){
	Collection.implement(item, function(){
		this.fireEvent(item, Array.prototype.slice.call(arguments));
		var results = Array.prototype[item].apply(this.list, arguments);
		if (({pop:1, push:1, shift:1, unshift:1})[item]) this.length = this.list.length;
		return results instanceof Array ? new Collection(results) : results;
	});
});

// Now for extensions..
for (var i in Array.prototype){
	if (Array.prototype[i] instanceof Function) (function(item){
		Collection.implement(i, function(){
			this.fireEvent(item, Array.prototype.slice.call(arguments));
			var results = Array.prototype[item].apply(this.list, arguments);
			return results instanceof Array ? new Collection(results) : results;
		});
	})(i);
}


Collection.implement($extend({

	toString: function(){
		return this.list.toString();
	},

	valueOf: function(){
		return this.list.valueOf();
	},

	concat: function(){
		var args = Array.prototype.slice.call(arguments);
		this.fireEvent('concat', args);
		args = args.map(function(i){ return i instanceof Collection ? i.list : i; });
		var results = Array.prototype.concat.apply(this.list, args);
		return results instanceof Array ? new Collection(results) : results;
	}

}, new Events));

})();