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import { MonoTypeOperatorFunction } from '../interfaces';
/**
* Emits only the last `count` values emitted by the source Observable.
*
* <span class="informal">Remembers the latest `count` values, then emits those
* only when the source completes.</span>
*
* <img src="./img/takeLast.png" width="100%">
*
* `takeLast` returns an Observable that emits at most the last `count` values
* emitted by the source Observable. If the source emits fewer than `count`
* values then all of its values are emitted. This operator must wait until the
* `complete` notification emission from the source in order to emit the `next`
* values on the output Observable, because otherwise it is impossible to know
* whether or not more values will be emitted on the source. For this reason,
* all values are emitted synchronously, followed by the complete notification.
*
* @example <caption>Take the last 3 values of an Observable with many values</caption>
* var many = Rx.Observable.range(1, 100);
* var lastThree = many.takeLast(3);
* lastThree.subscribe(x => console.log(x));
*
* @see {@link take}
* @see {@link takeUntil}
* @see {@link takeWhile}
* @see {@link skip}
*
* @throws {ArgumentOutOfRangeError} When using `takeLast(i)`, it delivers an
* ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0`.
*
* @param {number} count The maximum number of values to emit from the end of
* the sequence of values emitted by the source Observable.
* @return {Observable<T>} An Observable that emits at most the last count
* values emitted by the source Observable.
* @method takeLast
* @owner Observable
*/
export declare function takeLast<T>(count: number): MonoTypeOperatorFunction<T>;
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49 entries across 49 versions & 4 rubygems