callback-heaven/samples/chain.js

Transcode callbacks into synchronous code

var $p, $ps, $pif, $ploop, $pswitch, promiseResult;

function chain(){
  var a = this.modify(
    this.proces( $p( $.get('/a') )),
    $p( $.get('/b') ));
  console.log(a);
}

function chainResult(){
  var a = null;
  return promiseResult(this,[
    [ 
      "push",
        ["async", function(){ return $.get('/a'); }],
        ["async", function(){ return $.get('/b'); }]
    ],
    function(r1,r2){
      a = this.modify(this.process(r1,r2));
      console.log(a);
    }
  ]);
}

function complexChain(){
  var a = this.modify(
      this.process( $.get('/a') ? $.get('/b') : $.get('/c') )
    );
}

function complexChainResult(){
  var a;
  return promiseResult(this,[
    ["push", 
      [ "if",{
        test: ["async", function(){ return $.get('/a'); }],
        then: ["async", function(){ return $.get('/b'); }],
        "else": ["async", function(){ return $.get('/c'); }]
      }]
    ],
    function(r1){
      a = this.modify(this.process(r1));
    }
  ]);
}