bradtraversy

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Sign up for Digital Ocean

If you use the referal link below, you get $10 free (1 or 2 months) https://m.do.co/c/5424d440c63a

2. Create a droplet and log in via ssh

I will be using the root user, but would suggest creating a new user

estorgio

Mounting VirtualBox shared folders on Ubuntu Server 18.04 LTS (Bionic Beaver)

This guide will walk you through the steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest.

Prerequisites

This guide assumes that you are using the following setup:

• Oracle VM VirtualBox version 6.0.10 with Extension Pack installed
• Microsoft Windows 7 SP1 as the host OS
• A fresh install of Ubuntu Server 18.04.2 LTS as the guest OS

You could still make this guide work with other setups (possibly with some modifications to the commands and whatnot).

dereknelson

//...store logic

// profiler for redux actions
const userTiming = (store) => (next) => (action) => {
    if (performance.mark === undefined) return next(action)
    performance.mark(`${action.type}_start`);
    const result = next(action);
    performance.mark(`${action.type}_end`);
    performance.measure(`${action.type}`,`${action.type}_start`,`${action.type}_end`,)
    return result

fongandrew

Start With This

Before getting to React, it's helpful to know what this does generally in Javascript. Take the following snippet of code. It's written in ES6 but the principles for this predate ES6.

class Dog {
  constructor() {

jherax

type FilterOperator = 'AND' | 'OR';
type FiltersBy<T> = {
  [K in keyof T]?: (value: T[K]) => boolean;
};

/**
 * Factory function that creates a specialized function to filter
 * arrays, by validating all filters (AND operator),
 * or validating just one of the filters (OR operator).
 * @param operator Method to validate all filters: AND, OR

dreikanter

Symmetic encryption

For symmetic encryption, you can use the following:

To encrypt:

openssl aes-256-cbc -salt -a -e -in plaintext.txt -out encrypted.txt

To decrypt:

auser

export const GoogleApi = function(opts) {
  opts = opts || {}

  const apiKey = opts.apiKey;
  const libraries = opts.libraries || [];
  const client = opts.client;
  const URL = 'https://maps.googleapis.com/maps/api/js';

  const googleVersion = '3.22';
  let script = null;

laterbreh

var app = express();
app.io = require('socket.io')();

var routes = require('./routes/index')(app.io);

app.use('/', routes);

scripting

var request = require ("request");

var urlWebHook = "https://hooks.slack.com/services/abcdef"; //the URL you get on your "incoming web hooks" page.

function sendToSlack (s, theUsername, theIconUrl, theIconEmoji, theChannel) {
	var payload = {
		text: s
		};
	if (theUsername !== undefined) {
		payload.username = theUsername;

arunoda

Installing SSHPASS

SSHPass is a tiny utility, which allows you to provide the ssh password without using the prompt. This will very helpful for scripting. SSHPass is not good to use in multi-user environment. If you use SSHPass on your development machine, it don't do anything evil.

Installing on Ubuntu

apt-get install sshpass

Installing on OS X