name : scheduleArray.ts import { Observable } from '../Observable'; import { SchedulerLike } from '../types'; export function scheduleArray<T>(input: ArrayLike<T>, scheduler: SchedulerLike) { return new Observable<T>((subscriber) => { // The current array index. let i = 0; // Start iterating over the array like on a schedule. return scheduler.schedule(function () { if (i === input.length) { // If we have hit the end of the array like in the // previous job, we can complete. subscriber.complete(); } else { // Otherwise let's next the value at the current index, // then increment our index. subscriber.next(input[i++]); // If the last emission didn't cause us to close the subscriber // (via take or some side effect), reschedule the job and we'll // make another pass. if (!subscriber.closed) { this.schedule(); } } }); }); }