Hoang Nguyen hugo53

Install RabbitMQ on CentOS 7

sudo yum -y install epel-release
sudo yum -y update

Install Erlang

Download repository

Firebase Admin Multi App Initialization - ES6

This is a snippet that uses firebase's firebase-admin to initialize multiple firebase projects in one admin application.

ES5 version

Using ES6

import 'firebase';

FFmpeg Cheat Sheet for 360º video

Brought to you by Headjack

FFmpeg is one of the most powerful tools for video transcoding and manipulation, but it's fairly complex and confusing to use. That's why I decided to create this cheat sheet which shows some of the most often used commands.

Let's start with some basics:

ffmpeg calls the FFmpeg application in the command line window, could also be the full path to the FFmpeg binary or .exe file

	public PagedData findUsersByActivationStatusWithPaging(UserActivationStatus activationStatus, String pagingState) {
	logger.info("Finding users by activation status {}...", activationStatus);

	Select select = QueryBuilder
	.select()
	.from("user");
	select.where(eq("activationStatus", activationStatus.name()));
	select.setFetchSize(pagingFetchSize);
	if (pagingState != null) {
	select.setPagingState(PagingState.fromString(pagingState));

	#!/usr/bin/env bash

	# Installs ffmpeg from source (HEAD) with libaom and libx265, as well as a few
	# other common libraries
	# binary will be at ~/bin/ffmpeg

	sudo apt update && sudo apt upgrade -y

	mkdir -p ~/ffmpeg_sources ~/bin
	export PATH="$HOME/bin:$PATH"

	func fetchContentLength(for url: URL, completionHandler: @escaping (_ contentLength: UInt64?) -> ()) {

	var request = URLRequest(url: url)
	request.httpMethod = "HEAD"

	let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
	guard error == nil,
	let response = response as? HTTPURLResponse,
	let contentLength = response.allHeaderFields["Content-Length"] as? String else {
	completionHandler(nil)

	"""Server-side I/O Performance in Python

	Based on the article and discussion at:

	https://www.toptal.com/back-end/server-side-io-performance-node-php-java-go

	The code was posted at:

	https://peabody.io/post/server-env-benchmarks/

	###
	# HAProxy configuration for Eventmq Web-node.
	# Configured to serve:
	# - 100k websocket connections
	# - 2k (2% of WS) streaming connections (5k fullconn)
	# - 100 (0.1% of WS) xhr connections (5k fullconn)
	###

	global
	log 127.0.0.1 local2 info

	const Koa = require('koa');
	const app = new Koa();

	app.use(ctx => {
	ctx.body = 'Hello World';
	});

	var listener = app.listen(process.env.PORT \|\| 3000, () => {
	console.log(`Listening on port ${listener.address().port}`);
	});

	processor : 0
	vendor_id : GenuineIntel
	cpu family : 6
	model : 61
	model name : Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
	stepping : 4
	microcode : 0x23
	cpu MHz : 2457.468
	cache size : 3072 KB