parallel.es/src/common/parallel/slave/times-iterator.ts

Simple parallelization for EcmaScript

import {IParallelTaskEnvironment} from "../";
/**
 * Generator that creates an iterator containing end - start elements that are created by calling the iteratee
 * @param start the start value (inclusive)
 * @param end end value (exclusive)
 * @param iteratee that is to be called to create the elements
 * @param env the environment of the job
 * @param TResult type of the created elements by the iteratee
 * @returns iterator for the created elements
 */
export function timesIterator<TResult>(start: number, end: number, iteratee: (this: void, i: number, env: IParallelTaskEnvironment) => TResult, env: IParallelTaskEnvironment): Iterator<TResult> {
    let next = start;
    return {
        next(): IteratorResult<TResult> {
            let current = next;
            next = current + 1;
            if (current < end) {
                return { done: false, value: iteratee(current, env) };
            }
            return { done: true } as IteratorResult<TResult>;
        }
    };
}