title: Sequencing ajax requests
body: <p>I find I sometimes need to iterate some collection and make an ajax call for each element. I want each call to return before moving to the next element so that I don't blast the server with requests - which often leads to other issues. And I don't want to set async to false and freeze the browser.</p>
  
  <p>Usually this involves setting up some kind of iterator context that i step thru upon each success callback. I think there must be a cleaner simpler way?</p>
  
  <p>Does anyone have a clever design pattern for how to neatly work thru a collection making ajax calls for each item?</p>