and.md

This is RxJS v 4. Find the latest version here

Rx.Observable.prototype.and(rightSource)

Ⓢ

Propagates the observable sequence that reacts first.

Arguments

1. right (Observable): Observable sequence to match with the current sequence.

Returns

(Pattern): Pattern object that matches when both observable sequences have an available value.

Example

// Choice of either plan, the first set of timers or second set
var source = Rx.Observable.when(
    Rx.Observable.timer(200).and(Rx.Observable.timer(300)).thenDo(function (x, y) { return 'first'; }),
    Rx.Observable.timer(400).and(Rx.Observable.timer(500)).thenDo(function (x, y) { return 'second'; })
);

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

// => Next: first
// => Next: second
// => Completed

Location

File:

• /src/core/linq/observable/and.js

Dist:

• rx.all.js
• rx.all.compat.js
• rx.joinpatterns.js

Prerequisites:

• rx.js | rx.compat.js | rx.lite.js | rx.lite.compat.js

NPM Packages:

• rx

NuGet Packages:

• RxJS-All
• RxJS-JoinPatterns

Unit Tests:

• /tests/observable/when.js