node.js - nodejs の非同期および並列関数

Question

Asyncモジュールでparallel()関数を使用して取得して発行します...

配列imagesが空です...

var asyncTasks = [];

switch(type){
  case 'instafilm':

    var newFileName;
    var images = [];

    selectedPhotos.forEach(function(id){
      newFileName = pathDir + '/' + id + '.jpg';
      asyncTasks.push(function(callback){
        self.api.media(id, function(err, media, remaining, limit) {
          images.push(media.images.thumbnail.url);
        });
      });
    });

    asyncTasks.push( function(callback){
      console.log(images); // empty
    });


    break;
}

console.log(images); // empty

編集＃1：

var asyncTasks = [];

var newFileName;
var images = [];

selectedPhotos.forEach(function(id){
  newFileName = pathDir + '/' + id + '.jpg';
  asyncTasks.push(function(callback){
    self.api.media(id, function(err, media, remaining, limit) {
      images.push(media.images.thumbnail.url);
      callback(null);
    });
  });
});

asyncTasks.push( function(callback){
  console.log(images); // before creating .zip I need to write files using images[]
  gm()
  .in('-page', '+0+0')
  .in('./public/images/instafilm.jpg')
  .in('-page', '+10+10')
  .in(images[0])
  .in('-page', '+10+30')
  .in(images[1])
  .in('-page', '+10+60')
  .in(images[2])
  .in('-page', '+10+90')
  .in(images[3])
  .mosaic()
  .minify()
  .write(newFileName, function (err) {
    if (!err) console.log('done');
    if (err) console.log(err);
    callback();
  });
});



async.parallel(asyncTasks, function(){
    // here I write a .zip file
    var admZip = new AdmZip();
    var pathDir = './public/uploads/'+reference;
    admZip.addLocalFolder(pathDir);
    var willSendthis = admZip.toBuffer();
    admZip.writeZip('./public/uploads/'+reference+'.zip');   
});