import { reduce } from './reduce';
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import { OperatorFunction } from '../types';
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function toArrayReducer<T>(arr: T[], item: T, index: number) {
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if (index === 0) {
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return [item];
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}
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arr.push(item);
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return arr;
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}
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/**
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* Collects all source emissions and emits them as an array when the source completes.
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*
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* <span class="informal">Get all values inside an array when the source completes</span>
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*
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* 
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*
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* `toArray` will wait until the source Observable completes before emitting
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* the array containing all emissions. When the source Observable errors no
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* array will be emitted.
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*
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* ## Example
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* ```ts
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* import { interval } from 'rxjs';
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* import { toArray, take } from 'rxjs/operators';
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*
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* const source = interval(1000);
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* const example = source.pipe(
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* take(10),
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* toArray()
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* );
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*
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* const subscribe = example.subscribe(val => console.log(val));
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*
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* // output: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
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*
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* ```
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* @return An array from an observable sequence.
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* @method toArray
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* @owner Observable
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*/
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export function toArray<T>(): OperatorFunction<T, T[]> {
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return reduce(toArrayReducer, [] as T[]);
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}
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