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