Krabaton

There have been proposals about exposing these variables through import.meta, but for now, you need a hacky workaround that I found here:

// expose.js
module.exports = {__dirname};

// use.mjs
import expose from './expose.js';
const {__dirname} = expose;

In Node.js 10 there's an alternative that doesn't require creating multiple files:

Krabaton

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

Krabaton

function delay(ms) {
    return () => {
        return new Promise(resolve => setTimeout(() => {
            resolve();
            console.log('!!!');
        }, ms));
    }
}

function waterfall(list) {

Krabaton

Token-Based Authentication(JWT)

Preconditions:

В данной заметке рассматривается работа JWT с симметичным алгоритмом шифрования (HS256/HS384/HS512)

Основы:

Аутентификация(authentication, от греч. αὐθεντικός [authentikos] – реальный, подлинный; от αὐθέντης [authentes] – автор) - это процесс проверки учётных данных пользователя (логин/пароль). Проверка подлинности пользователя путём сравнения введённого им пароля с паролем, сохранённым в базе данных пользователей;

Авторизация(authorization — разрешение, уполномочивание) - это проверка прав пользователя на доступ к определенным ресурсам.

Krabaton

module.exports = function () {
  $.gulp.task('copy:img', function () {
    return $.gulp.src('app/img/**/*.*')
      .pipe($.gp.cache($.gp.imagemin([
        $.gp.imagemin.gifsicle({
          interlaced: true
        }),
        $.gp.imagemin.jpegtran({
          progressive: true
        }),

Krabaton

var counterModule = (function () {
  var instance,
      counter = 0;

  var getCounter = function () {
    return counter;
  }

  var increaseCounter = function () {
    counter ++;

Krabaton

var db = mongoose.connect('mongodb://localhost:27017/DB'); 

// In middleware
app.use(function (req, res, next) {

  // action after response
  var afterResponse = function() {
   logger.info({req: req}, "End request");

    // any other clean ups

Krabaton

'use strict';

// simple express server
var express = require('express');
var app = express();
var router = express.Router();

app.use(express.static('public'));
app.get('/', function(req, res) {
    res.sendfile('./public/index.html');

Krabaton

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it much simpler to think about both the old list and the new one, what they contain, and

Krabaton

// debounce function that will wrap our event
function debounce(fn, delay) {
  // maintain a timer
  let timer = null;
  // closure function that has access to timer
  return function() {
    // get the scope and parameters of the function 
    // via 'this' and 'arguments'
    let context = this;
    let args = arguments;