jQuery: Ajax in loop

jq_ajax_inside_loop.js

// Extending jQuery.when
	if (jQuery.when.all === undefined) {
	    jQuery.when.all = function(deferreds) {
	        var deferred = new jQuery.Deferred();
	        
	        $.when.apply(jQuery, deferreds).then(
	            function() {
	                deferred.resolve(Array.prototype.slice.call(arguments));
	            },
	            function() {
	                deferred.fail(Array.prototype.slice.call(arguments));
	            }
	        );
	 
	        return deferred;
	    }
	};

	var ajax_caller = function(obj) {
	    return $.ajax({
				method: obj.mthod,
				url: obj.url,
				async: true,
				dataType: obj.type,
				data: obj.data,
				success: function(data){
					console.log(typeof data);
				}
			});
	};

	var ajaxData = [];

	$.each(TIAA_ud.ajaxCalls, function(){ var obj = arguments[1];
		return ajaxData.push(ajax_caller(obj));		
	});

	$.when.all(ajaxData).done(function(data){
		console.log(data,'done');
	});