Thunk fun.

gistfile1.txt

var thunkify = require('./index.js');

function wtf ( cb ) {
  console.log('start');
  // Function, expecting callback triggers twice
  cb( 'HELLO 1' );
  cb( 'HELLO 2' );
  cb( 'HELLO 3' );
  console.log('done');
  return;
}

var thunk = thunkify(wtf); // now we have thunk
var invoke = thunk();      // now we invoke without any args, or callback

setTimeout( function () {
  // Now we set callback.
  invoke(
    function () { console.log( 'good', arguments ) }
  );
} ,1000 )