21 lines
985 B
JavaScript
21 lines
985 B
JavaScript
|
import { single as higherOrder } from '../operators/single';
|
||
|
|
/**
|
||
|
|
* Returns an Observable that emits the single item emitted by the source Observable that matches a specified
|
||
|
|
* predicate, if that Observable emits one such item. If the source Observable emits more than one such item or no
|
||
|
|
* such items, notify of an IllegalArgumentException or NoSuchElementException respectively.
|
||
|
|
*
|
||
|
|
* <img src="./img/single.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 - A predicate function to evaluate items emitted by the source Observable.
|
||
|
|
* @return {Observable<T>} An Observable that emits the single item emitted by the source Observable that matches
|
||
|
|
* the predicate.
|
||
|
|
.
|
||
|
|
* @method single
|
||
|
|
* @owner Observable
|
||
|
|
*/
|
||
|
|
export function single(predicate) {
|
||
|
|
return higherOrder(predicate)(this);
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=single.js.map
|