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50 lines
2.3 KiB
50 lines
2.3 KiB
"use strict"; |
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var withLatestFrom_1 = require('../operators/withLatestFrom'); |
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/* tslint:enable:max-line-length */ |
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/** |
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* Combines the source Observable with other Observables to create an Observable |
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* whose values are calculated from the latest values of each, only when the |
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* source emits. |
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* |
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* <span class="informal">Whenever the source Observable emits a value, it |
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* computes a formula using that value plus the latest values from other input |
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* Observables, then emits the output of that formula.</span> |
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* |
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* <img src="./img/withLatestFrom.png" width="100%"> |
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* |
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* `withLatestFrom` combines each value from the source Observable (the |
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* instance) with the latest values from the other input Observables only when |
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* the source emits a value, optionally using a `project` function to determine |
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* the value to be emitted on the output Observable. All input Observables must |
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* emit at least one value before the output Observable will emit a value. |
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* |
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* @example <caption>On every click event, emit an array with the latest timer event plus the click event</caption> |
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* var clicks = Rx.Observable.fromEvent(document, 'click'); |
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* var timer = Rx.Observable.interval(1000); |
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* var result = clicks.withLatestFrom(timer); |
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* result.subscribe(x => console.log(x)); |
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* |
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* @see {@link combineLatest} |
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* |
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* @param {ObservableInput} other An input Observable to combine with the source |
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* Observable. More than one input Observables may be given as argument. |
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* @param {Function} [project] Projection function for combining values |
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* together. Receives all values in order of the Observables passed, where the |
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* first parameter is a value from the source Observable. (e.g. |
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* `a.withLatestFrom(b, c, (a1, b1, c1) => a1 + b1 + c1)`). If this is not |
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* passed, arrays will be emitted on the output Observable. |
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* @return {Observable} An Observable of projected values from the most recent |
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* values from each input Observable, or an array of the most recent values from |
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* each input Observable. |
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* @method withLatestFrom |
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* @owner Observable |
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*/ |
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function withLatestFrom() { |
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var args = []; |
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for (var _i = 0; _i < arguments.length; _i++) { |
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args[_i - 0] = arguments[_i]; |
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} |
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return withLatestFrom_1.withLatestFrom.apply(void 0, args)(this); |
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} |
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exports.withLatestFrom = withLatestFrom; |
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//# sourceMappingURL=withLatestFrom.js.map
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