q parallel example 2

gistfile1.js

var Q = require( 'q' );

var overwrite_array = function ( source, array ){
  var result = source.slice( 0 );
  Array.prototype.splice.apply( result, [ 0, array.length ].concat( array ));

  return result;
};

var xyz = [ 5, 6, 7 ];

Q.all([

  // simulates a time consuming io operation
  Q.delay( 200 ).then( Q.fbind( function ( xyz ){
    console.log( 'first task ---------------' );
    console.log( 'x : ' + xyz[ 0 ] );
    console.log( 'y : ' + xyz[ 1 ] );
    console.log( 'z : ' + xyz[ 2 ] + '\n' );
    return [ 11, 12 ];
  }, overwrite_array( xyz, [ 7 ]))),

  Q.delay( 100 ).then( Q.fbind( function ( xyz ){
    console.log( 'second task ---------------' );
    console.log( 'x : ' + xyz[ 0 ] );
    console.log( 'y : ' + xyz[ 1 ] );
    console.log( 'z : ' + xyz[ 2 ] + '\n' );
    return 1000;
  }, overwrite_array( xyz, [ 9, 10, 55 ])))

]).then(function ( from_parallel ){
  return Q.delay( 150 ).then( Q.fbind( function ( xyz ){
    console.log( 'all finished callback ---------------' );
    console.log( 'from_parallel : ' + JSON.stringify( from_parallel ));
    console.log( 'x : ' + xyz[ 0 ] );
    console.log( 'y : ' + xyz[ 1 ] );
    console.log( 'z : ' + xyz[ 2 ] + '\n' );
  }, overwrite_array( xyz, [ 700 ])));
}).done();