eventualPurple.js

function resolve(cb, res){
  $.when(res).then(cb)
}

//usage: 
function definePurpleEventually(cb){
  setTimeout(function(){
    cb({
      purple: "color"
    })
  }, 1000);
}

function getPurpleDef(cb) {
  cb($.ajax('/purple'));
}

function whatIsPurple(purpleDef){
  console.log(purpleDef.purple);
}

definePurpleEventually(_.partial(resolve, whatIsPurple));
getPurple(_.partial(resolve, whatIsPurple));

//There has GOT be be a better idiom!