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145 lines
6.2 KiB
145 lines
6.2 KiB
2 years ago
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import { IScheduler } from '../Scheduler';
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import { Observable } from '../Observable';
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import { Subscriber } from '../Subscriber';
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import { Subscription } from '../Subscription';
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export declare type ConditionFunc<S> = (state: S) => boolean;
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export declare type IterateFunc<S> = (state: S) => S;
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export declare type ResultFunc<S, T> = (state: S) => T;
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export interface GenerateBaseOptions<S> {
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/**
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* Initial state.
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*/
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initialState: S;
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/**
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* Condition function that accepts state and returns boolean.
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* When it returns false, the generator stops.
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* If not specified, a generator never stops.
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*/
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condition?: ConditionFunc<S>;
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/**
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* Iterate function that accepts state and returns new state.
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*/
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iterate: IterateFunc<S>;
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/**
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* IScheduler to use for generation process.
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* By default, a generator starts immediately.
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*/
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scheduler?: IScheduler;
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}
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export interface GenerateOptions<T, S> extends GenerateBaseOptions<S> {
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/**
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* Result selection function that accepts state and returns a value to emit.
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*/
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resultSelector: ResultFunc<S, T>;
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}
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @extends {Ignored}
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* @hide true
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*/
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export declare class GenerateObservable<T, S> extends Observable<T> {
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private initialState;
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private condition;
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private iterate;
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private resultSelector;
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private scheduler;
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constructor(initialState: S, condition: ConditionFunc<S>, iterate: IterateFunc<S>, resultSelector: ResultFunc<S, T>, scheduler?: IScheduler);
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/**
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* Generates an observable sequence by running a state-driven loop
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* producing the sequence's elements, using the specified scheduler
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* to send out observer messages.
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*
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* <img src="./img/generate.png" width="100%">
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*
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* @example <caption>Produces sequence of 0, 1, 2, ... 9, then completes.</caption>
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* var res = Rx.Observable.generate(0, x => x < 10, x => x + 1, x => x);
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*
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* @example <caption>Using asap scheduler, produces sequence of 2, 3, 5, then completes.</caption>
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* var res = Rx.Observable.generate(1, x => x < 5, x => x * 2, x => x + 1, Rx.Scheduler.asap);
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*
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* @see {@link from}
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* @see {@link create}
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*
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* @param {S} initialState Initial state.
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* @param {function (state: S): boolean} condition Condition to terminate generation (upon returning false).
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* @param {function (state: S): S} iterate Iteration step function.
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* @param {function (state: S): T} resultSelector Selector function for results produced in the sequence.
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* @param {Scheduler} [scheduler] A {@link IScheduler} on which to run the generator loop. If not provided, defaults to emit immediately.
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* @returns {Observable<T>} The generated sequence.
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*/
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static create<T, S>(initialState: S, condition: ConditionFunc<S>, iterate: IterateFunc<S>, resultSelector: ResultFunc<S, T>, scheduler?: IScheduler): Observable<T>;
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/**
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* Generates an observable sequence by running a state-driven loop
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* producing the sequence's elements, using the specified scheduler
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* to send out observer messages.
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* The overload uses state as an emitted value.
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*
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* <img src="./img/generate.png" width="100%">
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*
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* @example <caption>Produces sequence of 0, 1, 2, ... 9, then completes.</caption>
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* var res = Rx.Observable.generate(0, x => x < 10, x => x + 1);
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*
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* @example <caption>Using asap scheduler, produces sequence of 1, 2, 4, then completes.</caption>
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* var res = Rx.Observable.generate(1, x => x < 5, x => x * 2, Rx.Scheduler.asap);
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*
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* @see {@link from}
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* @see {@link create}
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*
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* @param {S} initialState Initial state.
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* @param {function (state: S): boolean} condition Condition to terminate generation (upon returning false).
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* @param {function (state: S): S} iterate Iteration step function.
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* @param {Scheduler} [scheduler] A {@link IScheduler} on which to run the generator loop. If not provided, defaults to emit immediately.
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* @returns {Observable<S>} The generated sequence.
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*/
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static create<S>(initialState: S, condition: ConditionFunc<S>, iterate: IterateFunc<S>, scheduler?: IScheduler): Observable<S>;
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/**
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* Generates an observable sequence by running a state-driven loop
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* producing the sequence's elements, using the specified scheduler
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* to send out observer messages.
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* The overload accepts options object that might contain initial state, iterate,
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* condition and scheduler.
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*
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* <img src="./img/generate.png" width="100%">
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*
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* @example <caption>Produces sequence of 0, 1, 2, ... 9, then completes.</caption>
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* var res = Rx.Observable.generate({
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* initialState: 0,
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* condition: x => x < 10,
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* iterate: x => x + 1
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* });
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*
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* @see {@link from}
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* @see {@link create}
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*
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* @param {GenerateBaseOptions<S>} options Object that must contain initialState, iterate and might contain condition and scheduler.
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* @returns {Observable<S>} The generated sequence.
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*/
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static create<S>(options: GenerateBaseOptions<S>): Observable<S>;
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/**
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* Generates an observable sequence by running a state-driven loop
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* producing the sequence's elements, using the specified scheduler
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* to send out observer messages.
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* The overload accepts options object that might contain initial state, iterate,
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* condition, result selector and scheduler.
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*
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* <img src="./img/generate.png" width="100%">
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*
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* @example <caption>Produces sequence of 0, 1, 2, ... 9, then completes.</caption>
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* var res = Rx.Observable.generate({
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* initialState: 0,
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* condition: x => x < 10,
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* iterate: x => x + 1,
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* resultSelector: x => x
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* });
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*
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* @see {@link from}
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* @see {@link create}
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*
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* @param {GenerateOptions<T, S>} options Object that must contain initialState, iterate, resultSelector and might contain condition and scheduler.
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* @returns {Observable<T>} The generated sequence.
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*/
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static create<T, S>(options: GenerateOptions<T, S>): Observable<T>;
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/** @deprecated internal use only */ _subscribe(subscriber: Subscriber<any>): Subscription | Function | void;
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private static dispatch<T, S>(state);
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}
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