How to use the take function from rxjs
Find comprehensive JavaScript rxjs.take code examples handpicked from public code repositorys.
rxjs.take is an operator that takes a specified number of values emitted by an Observable and then completes the Observable.
20 21 22 23 24 25 26 27 28 29 30 31 32// genrate events of type myEvent rx.interval(450).pipe( rx.take(5) ).forEach( i => mee.emit('myEvent', 'Hello event ' + i) );
12
39
0GitHub: Dev-BestOW/rxjs
19 20 21 22 23 24 25 26 27 28 29range(10, 3) .pipe( // filter(n => n % 2 === 0), // take(5), ) .subscribe(console.log)
001+ 3 other calls in file
How does rxjs.take work?
rxjs.take is an operator in the RxJS library that allows you to extract only a specified number of values from a stream of values emitted by an observable, after which it will complete. When applied to an observable, take(n) will subscribe to the observable and emit the first n values emitted by the source observable. Once n values are emitted, the subscription is automatically unsubscribed and the observable completes. For example, observable.pipe(take(3)) will only emit the first 3 values from the observable, after which the subscription will be automatically unsubscribed.
Ai Example
1 2 3 4 5 6import { of } from "rxjs"; import { take } from "rxjs/operators"; const source = of(1, 2, 3, 4, 5); const example = source.pipe(take(3)); const subscribe = example.subscribe((val) => console.log(val));
In this example, take operator takes the first three emissions from the source observable (source) and then completes. The subscribe function logs the emitted values to the console, which are 1, 2, and 3.
