25 lines
1.2 KiB
JavaScript
25 lines
1.2 KiB
JavaScript
/** PURE_IMPORTS_START .._operators_last PURE_IMPORTS_END */
|
|
import { last as higherOrder } from '../operators/last';
|
|
/* tslint:enable:max-line-length */
|
|
/**
|
|
* Returns an Observable that emits only the last item emitted by the source Observable.
|
|
* It optionally takes a predicate function as a parameter, in which case, rather than emitting
|
|
* the last item from the source Observable, the resulting Observable will emit the last item
|
|
* from the source Observable that satisfies the predicate.
|
|
*
|
|
* <img src="./img/last.png" width="100%">
|
|
*
|
|
* @throws {EmptyError} Delivers an EmptyError to the Observer's `error`
|
|
* callback if the Observable completes before any `next` notification was sent.
|
|
* @param {function} predicate - The condition any source emitted item has to satisfy.
|
|
* @return {Observable} An Observable that emits only the last item satisfying the given condition
|
|
* from the source, or an NoSuchElementException if no such items are emitted.
|
|
* @throws - Throws if no items that match the predicate are emitted by the source Observable.
|
|
* @method last
|
|
* @owner Observable
|
|
*/
|
|
export function last(predicate, resultSelector, defaultValue) {
|
|
return higherOrder(predicate, resultSelector, defaultValue)(this);
|
|
}
|
|
//# sourceMappingURL=last.js.map
|