@coolgk/utils/queue.js

javascript, typescript utility and wrapper functions and classes: array, string, base64, ampq, bcrypt, cache, captcha, csv, email, jwt, number, pdf, tmp, token, unit conversion, url params, session, form data, google sign in, facebook sign in

/*!
 * @package @coolgk/utils
 * @version 3.1.4
 * @link https://github.com/coolgk/node-utils
 * @license MIT
 * @author Daniel Gong <daniel.k.gong@gmail.com>
 *
 * Copyright (c) 2017 Daniel Gong <daniel.k.gong@gmail.com>. All rights reserved.
 * Licensed under the MIT License.
 */

"use strict";
/*!
 *  Copyright (c) 2017 Daniel Gong <daniel.k.gong@gmail.com>. All rights reserved.
 *  Licensed under the MIT License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
let promise = Promise.resolve(undefined);
const backlogs = [];
function queue(callback, limit = 1) {
    if (backlogs.length === limit) {
        promise = Promise.all(backlogs.splice(0));
    }
    return backlogs[backlogs.push(promise.then((data) => callback(data)))
        - 1];
}
exports.queue = queue;
exports.default = queue;