Multiple Ajax requests using jQuery.when

multiple_ajax_request.js

var requests = [];
var responses = [];

var urls = []; // sample urls

$.each(urls, function(url) {
  requests.push( $.get(url, getQueryParams(), function(resp){ responses.push(resp) }) );
});

// here this is the object to which the arguments is to be passed
// so `this` is $.when and the arguments is the `requests` array. it can be even written as $.when.apply( $.when, requests )
$.when.apply( this, requests ).done(function(){
  // all the respectives responses for the urls are stored in the responses
  // example: responses[0] maps to requests[0]
});