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Executable File
{"version":3,"file":"combineLatest.js","sourceRoot":"","sources":["../../src/observable/combineLatest.ts"],"names":[],"mappings":";AAEA,4BAA8B,qBAAqB,CAAC,CAAA;AACpD,wBAA0B,iBAAiB,CAAC,CAAA;AAC5C,gCAAkC,mBAAmB,CAAC,CAAA;AACtD,8BAAwC,4BAA4B,CAAC,CAAA;AAuBrE,mCAAmC;AAEnC;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GA2GG;AACH;IAAoC,qBAG2B;SAH3B,WAG2B,CAH3B,sBAG2B,CAH3B,IAG2B;QAH3B,oCAG2B;;IAC7D,IAAI,OAAO,GAAkC,IAAI,CAAC;IAClD,IAAI,SAAS,GAAe,IAAI,CAAC;IAEjC,EAAE,CAAC,CAAC,yBAAW,CAAC,WAAW,CAAC,WAAW,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;QACrD,SAAS,GAAe,WAAW,CAAC,GAAG,EAAE,CAAC;IAC5C,CAAC;IAED,EAAE,CAAC,CAAC,OAAO,WAAW,CAAC,WAAW,CAAC,MAAM,GAAG,CAAC,CAAC,KAAK,UAAU,CAAC,CAAC,CAAC;QAC9D,OAAO,GAAiC,WAAW,CAAC,GAAG,EAAE,CAAC;IAC5D,CAAC;IAED,8EAA8E;IAC9E,4EAA4E;IAC5E,EAAE,CAAC,CAAC,WAAW,CAAC,MAAM,KAAK,CAAC,IAAI,iBAAO,CAAC,WAAW,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;QACxD,WAAW,GAA2B,WAAW,CAAC,CAAC,CAAC,CAAC;IACvD,CAAC;IAED,MAAM,CAAC,IAAI,iCAAe,CAAC,WAAW,EAAE,SAAS,CAAC,CAAC,IAAI,CAAC,IAAI,qCAAqB,CAAO,OAAO,CAAC,CAAC,CAAC;AACpG,CAAC;AAtBe,qBAAa,gBAsB5B,CAAA","sourcesContent":["import { Observable, ObservableInput } from '../Observable';\nimport { IScheduler } from '../Scheduler';\nimport { isScheduler } from '../util/isScheduler';\nimport { isArray } from '../util/isArray';\nimport { ArrayObservable } from './ArrayObservable';\nimport { CombineLatestOperator } from '../operators/combineLatest';\n\n/* tslint:disable:max-line-length */\nexport function combineLatest<T, R>(v1: ObservableInput<T>, project: (v1: T) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, T2, R>(v1: ObservableInput<T>, v2: ObservableInput<T2>, project: (v1: T, v2: T2) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, T2, T3, R>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, project: (v1: T, v2: T2, v3: T3) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, T2, T3, T4, R>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, project: (v1: T, v2: T2, v3: T3, v4: T4) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, T2, T3, T4, T5, R>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, T2, T3, T4, T5, T6, R>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5, v6: T6) => R, scheduler?: IScheduler): Observable<R>;\n\nexport function combineLatest<T, T2>(v1: ObservableInput<T>, v2: ObservableInput<T2>, scheduler?: IScheduler): Observable<[T, T2]>;\nexport function combineLatest<T, T2, T3>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, scheduler?: IScheduler): Observable<[T, T2, T3]>;\nexport function combineLatest<T, T2, T3, T4>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, scheduler?: IScheduler): Observable<[T, T2, T3, T4]>;\nexport function combineLatest<T, T2, T3, T4, T5>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, scheduler?: IScheduler): Observable<[T, T2, T3, T4, T5]>;\nexport function combineLatest<T, T2, T3, T4, T5, T6>(v1: ObservableInput<T>, v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>, scheduler?: IScheduler): Observable<[T, T2, T3, T4, T5, T6]>;\n\nexport function combineLatest<T>(array: ObservableInput<T>[], scheduler?: IScheduler): Observable<T[]>;\nexport function combineLatest<R>(array: ObservableInput<any>[], scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T, R>(array: ObservableInput<T>[], project: (...values: Array<T>) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<R>(array: ObservableInput<any>[], project: (...values: Array<any>) => R, scheduler?: IScheduler): Observable<R>;\nexport function combineLatest<T>(...observables: Array<ObservableInput<T> | IScheduler>): Observable<T[]>;\nexport function combineLatest<T, R>(...observables: Array<ObservableInput<T> | ((...values: Array<T>) => R) | IScheduler>): Observable<R>;\nexport function combineLatest<R>(...observables: Array<ObservableInput<any> | ((...values: Array<any>) => R) | IScheduler>): Observable<R>;\n/* tslint:enable:max-line-length */\n\n/**\n * Combines multiple Observables to create an Observable whose values are\n * calculated from the latest values of each of its input Observables.\n *\n * <span class=\"informal\">Whenever any input Observable emits a value, it\n * computes a formula using the latest values from all the inputs, then emits\n * the output of that formula.</span>\n *\n * <img src=\"./img/combineLatest.png\" width=\"100%\">\n *\n * `combineLatest` combines the values from all the Observables passed as\n * arguments. This is done by subscribing to each Observable in order and,\n * whenever any Observable emits, collecting an array of the most recent\n * values from each Observable. So if you pass `n` Observables to operator,\n * returned Observable will always emit an array of `n` values, in order\n * corresponding to order of passed Observables (value from the first Observable\n * on the first place and so on).\n *\n * Static version of `combineLatest` accepts either an array of Observables\n * or each Observable can be put directly as an argument. Note that array of\n * Observables is good choice, if you don't know beforehand how many Observables\n * you will combine. Passing empty array will result in Observable that\n * completes immediately.\n *\n * To ensure output array has always the same length, `combineLatest` will\n * actually wait for all input Observables to emit at least once,\n * before it starts emitting results. This means if some Observable emits\n * values before other Observables started emitting, all that values but last\n * will be lost. On the other hand, is some Observable does not emit value but\n * completes, resulting Observable will complete at the same moment without\n * emitting anything, since it will be now impossible to include value from\n * completed Observable in resulting array. Also, if some input Observable does\n * not emit any value and never completes, `combineLatest` will also never emit\n * and never complete, since, again, it will wait for all streams to emit some\n * value.\n *\n * If at least one Observable was passed to `combineLatest` and all passed Observables\n * emitted something, resulting Observable will complete when all combined\n * streams complete. So even if some Observable completes, result of\n * `combineLatest` will still emit values when other Observables do. In case\n * of completed Observable, its value from now on will always be the last\n * emitted value. On the other hand, if any Observable errors, `combineLatest`\n * will error immediately as well, and all other Observables will be unsubscribed.\n *\n * `combineLatest` accepts as optional parameter `project` function, which takes\n * as arguments all values that would normally be emitted by resulting Observable.\n * `project` can return any kind of value, which will be then emitted by Observable\n * instead of default array. Note that `project` does not take as argument that array\n * of values, but values themselves. That means default `project` can be imagined\n * as function that takes all its arguments and puts them into an array.\n *\n *\n * @example <caption>Combine two timer Observables</caption>\n * const firstTimer = Rx.Observable.timer(0, 1000); // emit 0, 1, 2... after every second, starting from now\n * const secondTimer = Rx.Observable.timer(500, 1000); // emit 0, 1, 2... after every second, starting 0,5s from now\n * const combinedTimers = Rx.Observable.combineLatest(firstTimer, secondTimer);\n * combinedTimers.subscribe(value => console.log(value));\n * // Logs\n * // [0, 0] after 0.5s\n * // [1, 0] after 1s\n * // [1, 1] after 1.5s\n * // [2, 1] after 2s\n *\n *\n * @example <caption>Combine an array of Observables</caption>\n * const observables = [1, 5, 10].map(\n * n => Rx.Observable.of(n).delay(n * 1000).startWith(0) // emit 0 and then emit n after n seconds\n * );\n * const combined = Rx.Observable.combineLatest(observables);\n * combined.subscribe(value => console.log(value));\n * // Logs\n * // [0, 0, 0] immediately\n * // [1, 0, 0] after 1s\n * // [1, 5, 0] after 5s\n * // [1, 5, 10] after 10s\n *\n *\n * @example <caption>Use project function to dynamically calculate the Body-Mass Index</caption>\n * var weight = Rx.Observable.of(70, 72, 76, 79, 75);\n * var height = Rx.Observable.of(1.76, 1.77, 1.78);\n * var bmi = Rx.Observable.combineLatest(weight, height, (w, h) => w / (h * h));\n * bmi.subscribe(x => console.log('BMI is ' + x));\n *\n * // With output to console:\n * // BMI is 24.212293388429753\n * // BMI is 23.93948099205209\n * // BMI is 23.671253629592222\n *\n *\n * @see {@link combineAll}\n * @see {@link merge}\n * @see {@link withLatestFrom}\n *\n * @param {ObservableInput} observable1 An input Observable to combine with other Observables.\n * @param {ObservableInput} observable2 An input Observable to combine with other Observables.\n * More than one input Observables may be given as arguments\n * or an array of Observables may be given as the first argument.\n * @param {function} [project] An optional function to project the values from\n * the combined latest values into a new value on the output Observable.\n * @param {Scheduler} [scheduler=null] The IScheduler to use for subscribing to\n * each input Observable.\n * @return {Observable} An Observable of projected values from the most recent\n * values from each input Observable, or an array of the most recent values from\n * each input Observable.\n * @static true\n * @name combineLatest\n * @owner Observable\n */\nexport function combineLatest<T, R>(...observables: Array<any | ObservableInput<any> |\n Array<ObservableInput<any>> |\n (((...values: Array<any>) => R)) |\n IScheduler>): Observable<R> {\n let project: (...values: Array<any>) => R = null;\n let scheduler: IScheduler = null;\n\n if (isScheduler(observables[observables.length - 1])) {\n scheduler = <IScheduler>observables.pop();\n }\n\n if (typeof observables[observables.length - 1] === 'function') {\n project = <(...values: Array<any>) => R>observables.pop();\n }\n\n // if the first and only other argument besides the resultSelector is an array\n // assume it's been called with `combineLatest([obs1, obs2, obs3], project)`\n if (observables.length === 1 && isArray(observables[0])) {\n observables = <Array<Observable<any>>>observables[0];\n }\n\n return new ArrayObservable(observables, scheduler).lift(new CombineLatestOperator<T, R>(project));\n}"]} |