gistfile1.js

/* 
  Array.each_asynchronously  
  
	Description:
  Works just like Array.each except runs each iteration on a specified delay. 
  This means that script execution will continue in between each iteration, 
  rather than halting until the full array has been processed. 
  
  Arguments:
	-	fn: (function) The function to execute on each item in the array. It is
		passed three arguments: the item, the index and the array itself.
	-	delay: (number, optional) Duration of timer for each call to fn. Defaults 
		to 10ms. 
	-	bind: (object, optional) The object to be used as 'this' in the fn.
	
	Example:
	['brawndo','has','electrolytes'].each_asynchronously(function(str,i,arr){ 
		console.log(str); 
	}, 1000);
*/

Array.implement({
	each_asynchronously: function(fn, delay, bind){
	  if (this.length == 0) return this;
		var delay = delay || 10; 
		var items = this.concat();
		var index = 0;

		(function(){
			fn.run([items.shift(), index, this], bind);
			index += 1;
			if (items.length > 0) setTimeout(arguments.callee.bind(this), delay);
		}).delay(delay, this);
		
		return this;
	}
});