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$.when with arbitrary number of deferred objects?


$.when with arbitrary number of deferred objects?

By : Eduard
Date : November 25 2020, 09:00 AM
will help you Instead of $.when(promises) you'll need to make use of Function.prototype.apply as $.when.apply($, promises)
Note that this also means that your then callbacks will likely need to make use of the arguments collection to access the relevant results for each deferred.
code :


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raising jquery deferred.then() once all deferred objects have been resolved

raising jquery deferred.then() once all deferred objects have been resolved


By : William King
Date : March 29 2020, 07:55 AM
With these it helps as Eli pointed out, $.when() accepts a comma separated list of arguments and not an array. using Function.apply() to pass in the array seems to do the trick.
code :
function saveAll(callback) {
    var dataArray = [], deferreds = [];
    $.each(dataArray, function() {
        deferreds.push( save() );
    });

    $.when.apply(window, deferreds).then(callback);
}
How to implement database compatible python objects with arbitrary fields/arbitrary number of fields

How to implement database compatible python objects with arbitrary fields/arbitrary number of fields


By : siva krishna
Date : March 29 2020, 07:55 AM
this will help This seems like an excellent opportunity to use NoSQL databases. Something like MongoDB doesn't rely on a fixed schema, so it might be suitable for your scenario.
Resolve deferred object after other multiple deferred objects are resolved

Resolve deferred object after other multiple deferred objects are resolved


By : Ivo Marinic
Date : March 29 2020, 07:55 AM
help you fix your problem Put all of the promises from the loops into an array, then use $.when. Sadly, using $.when with an array is ugly:
code :
return $.when.apply($, theArray);
_refreshWorkspace: function(htmlBlocks){

  var promises = [];

  if('editor' in htmlBlocks){
    promises.push(
      app.destroy(this.editor).then((function(){
        this.editor.empty().append(htmlBlocks.editor);
      }).bind(this)).then((function(){
        app.refresh(this.editor);
      }).bind(this))
    );
  }

  if('listPanels' in htmlBlocks){
    promises.push(
      app.destroy(this.list).then((function(){
        this.list.empty().append(htmlBlocks.listPanels);
      }).bind(this)).then((function(){
        app.refresh(this.list);
      }).bind(this))
    );
  }

  if('listNav' in htmlBlocks){
    // similar code block       
  }

  return $.when.apply($, promises);
},
function doSomething() {
  var promises = [];
  var d1, d2, d3;
  
  d1 = new $.Deferred();
  promises.push(d1.promise());
  setTimeout(function() {
    snippet.log("Resolving d1");
    d1.resolve(1);
  }, Math.floor(Math.random() * 1000));
  
  d2 = new $.Deferred();
  promises.push(d2.promise());
  setTimeout(function() {
    snippet.log("Resolving d2");
    d2.resolve(2);
  }, Math.floor(Math.random() * 1000));
  
  d3 = new $.Deferred();
  promises.push(d3.promise());
  setTimeout(function() {
    snippet.log("Resolving d3");
    d3.resolve(3);
  }, Math.floor(Math.random() * 1000));
  
  return $.when.apply($, promises);
}

// Use it
doSomething().then(function() {
  snippet.log("All resolved");
});
<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="http://tjcrowder.github.io/simple-snippets-console/snippet.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Combine multiple jQuery Deferred objects into a new Deferred object

Combine multiple jQuery Deferred objects into a new Deferred object


By : Thomas Karlsson
Date : March 29 2020, 07:55 AM
will help you In jQuery, you can use $.when() to combine multiple promises into one.
code :
aaa.then(function() {
    return $.when(bbb(), ccc());
}).then(ddd);
Intersection of an arbitrary number of objects

Intersection of an arbitrary number of objects


By : Kynno
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You could use this ES6 function, which does not mutate any of the input objects, but returns a new one:
code :
function intersectObjects(...objects) {
    return !objects.length ? {}
         : Object.assign(...Object.keys(objects[0]).filter( 
               key => objects.every( o => key in o )
           ).map( key => ({ [key]: objects[0][key]}) ));
}

// Sample run
var data = [
    { a: 1, b: 2, c: 3, d: 4, e: 5},
    {       b: 2, c: 3, d: 4, e: 5, f: 6},
    { a: 1, b: 2,       d: 4, e: 5},
    { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7}
];
var result = intersectObjects(...data);
console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
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