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50 lines
2.3 KiB
50 lines
2.3 KiB
"use strict"; |
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var switchMapTo_1 = require('../operators/switchMapTo'); |
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/* tslint:enable:max-line-length */ |
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/** |
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* Projects each source value to the same Observable which is flattened multiple |
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* times with {@link switch} in the output Observable. |
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* |
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* <span class="informal">It's like {@link switchMap}, but maps each value |
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* always to the same inner Observable.</span> |
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* |
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* <img src="./img/switchMapTo.png" width="100%"> |
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* |
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* Maps each source value to the given Observable `innerObservable` regardless |
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* of the source value, and then flattens those resulting Observables into one |
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* single Observable, which is the output Observable. The output Observables |
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* emits values only from the most recently emitted instance of |
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* `innerObservable`. |
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* |
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* @example <caption>Rerun an interval Observable on every click event</caption> |
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* var clicks = Rx.Observable.fromEvent(document, 'click'); |
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* var result = clicks.switchMapTo(Rx.Observable.interval(1000)); |
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* result.subscribe(x => console.log(x)); |
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* |
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* @see {@link concatMapTo} |
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* @see {@link switch} |
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* @see {@link switchMap} |
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* @see {@link mergeMapTo} |
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* |
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* @param {ObservableInput} innerObservable An Observable to replace each value from |
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* the source Observable. |
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* @param {function(outerValue: T, innerValue: I, outerIndex: number, innerIndex: number): any} [resultSelector] |
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* A function to produce the value on the output Observable based on the values |
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* and the indices of the source (outer) emission and the inner Observable |
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* emission. The arguments passed to this function are: |
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* - `outerValue`: the value that came from the source |
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* - `innerValue`: the value that came from the projected Observable |
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* - `outerIndex`: the "index" of the value that came from the source |
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* - `innerIndex`: the "index" of the value from the projected Observable |
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* @return {Observable} An Observable that emits items from the given |
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* `innerObservable` (and optionally transformed through `resultSelector`) every |
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* time a value is emitted on the source Observable, and taking only the values |
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* from the most recently projected inner Observable. |
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* @method switchMapTo |
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* @owner Observable |
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*/ |
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function switchMapTo(innerObservable, resultSelector) { |
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return switchMapTo_1.switchMapTo(innerObservable, resultSelector)(this); |
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} |
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exports.switchMapTo = switchMapTo; |
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//# sourceMappingURL=switchMapTo.js.map
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