q parallel example

gistfile1.js

var Q = require( 'q' );

var xyz = { x : 5, y : 6, z : 7 };

Q.all([

  // simulates a time consuming io operation
  Q.delay( 200 ).then( function (){
    console.log( 'first task ---------------' );
    console.log( 'x : ' + xyz.x );
    console.log( 'y : ' + xyz.y );
    console.log( 'z : ' + xyz.z + '\n' );
    return [ 11, 12 ];
  }),

  Q.delay( 100 ).then( function (){
    console.log( 'second task ---------------' );
    console.log( 'x : ' + xyz.x );
    console.log( 'y : ' + xyz.y );
    console.log( 'z : ' + xyz.z + '\n' );
    return 1000;
  })

]).done( function ( from_parallel ) {
  setTimeout( function (){
    console.log( 'all finished callback ---------------' );
    console.log( 'from_parallel : ' + JSON.stringify( from_parallel ));
    console.log( 'x : ' + xyz.x );
    console.log( 'y : ' + xyz.y );
    console.log( 'z : ' + xyz.z + '\n' );
  }, 150 );
});