khanghoang

// Promise.all is good for executing many promises at once
Promise.all([
  promise1,
  promise2
]);

// Promise.resolve is good for wrapping synchronous code
Promise.resolve().then(function () {
  if (somethingIsNotRight()) {
    throw new Error("I will be rejected asynchronously!");

khanghoang

OS	Command	Meaning
Ubuntu	`netstat -punta	grep `
Mac OS	`lsof -i	grep LISTEN`

khanghoang

module.exports = function (shipit) {
  require('shipit-deploy')(shipit);

  shipit.initConfig({
    default: {
      workspace: '../shipit-temp-folder',
      deployTo: '~/express4-es6',
      branch: "shipit",
      repositoryUrl: 'https://github.com/khanghoang/express4-es6.git',
      ignores: ['.git', 'node_modules'],

khanghoang

##Get started ###On local

• Install shipit & shipit-deploy
• Add shipitfile.js
• Run ssh-add /path/to/pem/file

###Errors ####node: not found Apparently Debian has renamed the command node to nodejs which is causing the problem. For me installing nodejs-legacy fixed the issue.
To fix:

khanghoang

@kangax's ES6 quiz, explained

@kangax created a new interesting quiz, this time devoted to ES6 (aka ES2015). I found this quiz very interesting and quite hard (made myself 3 mistakes on first pass).

Here we go with the explanations:

Question 1:

(function(x, f = () => x) {

khanghoang

# Author: Pieter Noordhuis
# Description: Simple demo to showcase Redis PubSub with EventMachine
#
# Update 7 Oct 2010:
# - This example does *not* appear to work with Chrome >=6.0. Apparently,
#   the WebSocket protocol implementation in the cramp gem does not work
#   well with Chrome's (newer) WebSocket implementation.
#
# Requirements:
# - rubygems: eventmachine, thin, cramp, sinatra, yajl-ruby

khanghoang

##ES6 features ###Symbol #####Another primary type
Among undefined, Null, Boolean, Number, String, Object #####To represent of concepts.

• As property keys.
  Example: javascript const MY_KEY = Symbol(); let obj = {};

khanghoang

##GitLab + Jenkins + Auto Deployment. ###Install GitLab Follow GitLab installation guide

Or via IAM EC2 but it's ver7.x so you would update it to get GitLab CI.
https://about.gitlab.com/upgrade-to-package-repository/
####Install gitlab-ci-runner https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/blob/master/docs/install/linux-repository.md

####Gitlab Config file

khanghoang

OS X Preferences

---

most of these require logout/restart to take effect

# Enable character repeat on keydown
defaults write -g ApplePressAndHoldEnabled -bool false

# Set a shorter Delay until key repeat

khanghoang

export class EnumSymbol {
    sym = Symbol.for(name);
    value: number;
    description: string;

    constructor(name: string, {value, description}) {

        if(!Object.is(value, undefined)) this.value  = value;
        if(description) this.description  = description;