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3.9 KiB
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{"version":3,"file":"mergeMap.js","sourceRoot":"","sources":["../../src/operator/mergeMap.ts"],"names":[],"mappings":";AACA,yBAAgD,uBAAuB,CAAC,CAAA;AAKxE,mCAAmC;AAEnC;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAyDG;AACH,kBAAuD,OAAwD,EAC7E,cAAuG,EACvG,UAA6C;IAA7C,0BAA6C,GAA7C,aAAqB,MAAM,CAAC,iBAAiB;IAC7E,MAAM,CAAC,mBAAmB,CAAC,OAAO,EAAO,cAAc,EAAE,UAAU,CAAC,CAAC,IAAI,CAAsB,CAAC;AAClG,CAAC;AAJe,gBAAQ,WAIvB,CAAA","sourcesContent":["import { Observable, ObservableInput } from '../Observable';\nimport { mergeMap as higherOrderMergeMap } from '../operators/mergeMap';\n\n/* tslint:disable:max-line-length */\nexport function mergeMap<T, R>(this: Observable<T>, project: (value: T, index: number) => ObservableInput<R>, concurrent?: number): Observable<R>;\nexport function mergeMap<T, I, R>(this: Observable<T>, project: (value: T, index: number) => ObservableInput<I>, resultSelector: (outerValue: T, innerValue: I, outerIndex: number, innerIndex: number) => R, concurrent?: number): Observable<R>;\n/* tslint:enable:max-line-length */\n\n/**\n * Projects each source value to an Observable which is merged in the output\n * Observable.\n *\n * <span class=\"informal\">Maps each value to an Observable, then flattens all of\n * these inner Observables using {@link mergeAll}.</span>\n *\n * <img src=\"./img/mergeMap.png\" width=\"100%\">\n *\n * Returns an Observable that emits items based on applying a function that you\n * supply to each item emitted by the source Observable, where that function\n * returns an Observable, and then merging those resulting Observables and\n * emitting the results of this merger.\n *\n * @example <caption>Map and flatten each letter to an Observable ticking every 1 second</caption>\n * var letters = Rx.Observable.of('a', 'b', 'c');\n * var result = letters.mergeMap(x =>\n * Rx.Observable.interval(1000).map(i => x+i)\n * );\n * result.subscribe(x => console.log(x));\n *\n * // Results in the following:\n * // a0\n * // b0\n * // c0\n * // a1\n * // b1\n * // c1\n * // continues to list a,b,c with respective ascending integers\n *\n * @see {@link concatMap}\n * @see {@link exhaustMap}\n * @see {@link merge}\n * @see {@link mergeAll}\n * @see {@link mergeMapTo}\n * @see {@link mergeScan}\n * @see {@link switchMap}\n *\n * @param {function(value: T, ?index: number): ObservableInput} project A function\n * that, when applied to an item emitted by the source Observable, returns an\n * Observable.\n * @param {function(outerValue: T, innerValue: I, outerIndex: number, innerIndex: number): any} [resultSelector]\n * A function to produce the value on the output Observable based on the values\n * and the indices of the source (outer) emission and the inner Observable\n * emission. The arguments passed to this function are:\n * - `outerValue`: the value that came from the source\n * - `innerValue`: the value that came from the projected Observable\n * - `outerIndex`: the \"index\" of the value that came from the source\n * - `innerIndex`: the \"index\" of the value from the projected Observable\n * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input\n * Observables being subscribed to concurrently.\n * @return {Observable} An Observable that emits the result of applying the\n * projection function (and the optional `resultSelector`) to each item emitted\n * by the source Observable and merging the results of the Observables obtained\n * from this transformation.\n * @method mergeMap\n * @owner Observable\n */\nexport function mergeMap<T, I, R>(this: Observable<T>, project: (value: T, index: number) => ObservableInput<I>,\n resultSelector?: ((outerValue: T, innerValue: I, outerIndex: number, innerIndex: number) => R) | number,\n concurrent: number = Number.POSITIVE_INFINITY): Observable<I | R> {\n return higherOrderMergeMap(project, <any>resultSelector, concurrent)(this) as Observable<I | R>;\n}\n"]} |