I am have a problem understanding why rejections are not passed on through a promise chain and I am hoping someone will be able to help me understand why. To me, attaching functionality to a chain of promises implies an intent that I am depending o...
I have three HTTP calls that need I need to make in a synchronous manner and how do I pass data from one call to the other?  function first() {    ajax() }  function second() {    ajax() }  function third() {    ajax() }   function main() {     fir...
Problem 1: only one API request is allowed at a given time, so the real network requests are queued while there's one that has not been completed yet. An app can call the API level anytime and expecting a promise in return. When the API call is...
I am currently trying to build a File Uploader using the HTML5 FileAPI. The File Uploader is supposed to handle multiple files and show image previews if the file is an image.  since the FileReader class works asynchronously I want to wait until al...
I have 3 processes that needs ajax to complete. But it is asynchronous and it fails to do what I wanted to do..  Lets say:   function a(param1, param2) {      $.post(..., function(result){          if(result){             b();          } else {...
Let's create a simple Deferred object:  defer = $.Deferred( function ( defer ) {     setTimeout( defer.resolve, 3000 ); });   The above Deferred object will be in the "pending" state for 3 seconds, and then switch to the "resolved"...
I'm mostly using programming languages like Scala and JavaScript. I'm trying to understand the similarities and differences in how async reactive programming is used in both languages. Can you help me?  I'm not taking any particular Js Pr...
I really like the idea of jQuery's deferred/promise pattern or paradigm but sometimes I have trouble wrapping my aging brain around the finer points or specific implementation details.  In fact recently I've found that the deferred/promise pa...
I have a function in form:  $.get_members = function() {     var group_id = $('#gid').val();     if($(this).val() == group_id)         return;      var deferr = $.Deferred();      $.get(url)         .done(function() {             ......
the simplest example of what I'm looking for is this:  var messageLoader = $.post("api/user/messages", {api:data})  messageLoader.done(function(data){    //do something  });   This works brilliantly, but only once.  If I want to update th...

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