import { Operator } from '../Operator';
|
import { Subscriber } from '../Subscriber';
|
import { Observable } from '../Observable';
|
import { MonoTypeOperatorFunction, TeardownLogic } from '../types';
|
|
/**
|
* Returns an Observable that skips the first `count` items emitted by the source Observable.
|
*
|
* 
|
*
|
* @param {Number} count - The number of times, items emitted by source Observable should be skipped.
|
* @return {Observable} An Observable that skips values emitted by the source Observable.
|
*
|
* @method skip
|
* @owner Observable
|
*/
|
export function skip<T>(count: number): MonoTypeOperatorFunction<T> {
|
return (source: Observable<T>) => source.lift(new SkipOperator(count));
|
}
|
|
class SkipOperator<T> implements Operator<T, T> {
|
constructor(private total: number) {
|
}
|
|
call(subscriber: Subscriber<T>, source: any): TeardownLogic {
|
return source.subscribe(new SkipSubscriber(subscriber, this.total));
|
}
|
}
|
|
/**
|
* We need this JSDoc comment for affecting ESDoc.
|
* @ignore
|
* @extends {Ignored}
|
*/
|
class SkipSubscriber<T> extends Subscriber<T> {
|
count: number = 0;
|
|
constructor(destination: Subscriber<T>, private total: number) {
|
super(destination);
|
}
|
|
protected _next(x: T) {
|
if (++this.count > this.total) {
|
this.destination.next(x);
|
}
|
}
|
}
|
