forkjoin.md

Rx.Observable.forkJoin(...args [resultSelector])

{% if book.isPdf %}

{% else %}

{% endif %}

Runs all observable sequences in parallel and collect their last elements.

Arguments

1. args (Arguments | Array): An array or arguments of Observable sequences or Promises to collect the last elements for.
2. resultSelector: (Function) - The result selector from all the values produced. If not specified, forkJoin will return the results as an array.

Returns

(Observable): An observable sequence with an array collecting the last elements of all the input sequences or the result of the result selector if specified.

{% if book.isPdf %}

Example

/* Using observables and Promises */
var source = Rx.Observable.forkJoin(
    Rx.Observable.return(42),
    Rx.Observable.range(0, 10),
    Rx.Observable.fromArray([1,2,3]),
    RSVP.Promise.resolve(56)
);

var subscription = source.subscribe(
  x => console.log(`onNext: ${x}`),
  e => console.log(`onError: ${e}`),
  () => console.log('onCompleted'));

// => onNext: [42, 9, 3, 56]
// => onCompleted

{% else %}

Example

{% endif %}

{% if book.isPdf %}

Example

var source = Rx.Observable.forkJoin(
  Rx.Observable.just(42),
  Rx.Observable.just(56),
  function (x, y) { return x + y; }
);

var subscription = source.subscribe(
  function (x) {
    console.log('Next: %s', x);
  },
  function (err) {
    console.log('Error: %s', err);
  },
  function () {
    console.log('Completed');
  });

// => Next: 98
// => Completed

{% else %}

Example

{% endif %}