Milan Rawal codemilan

React lifecycle cheatsheet

Method	Side effects¹	State updates²	Example uses
Mounting
`componentWillMount`		✓	Constructor equivalent for `createClass`
`render`			Create and return element(s)
`componentDidMount`	✓	✓	DOM manipulations, network requests, etc.
Updating
`componentWillReceiveProps`		✓	Update `state` based on changed `props`

What is React Fiber? And how can I try it out today?

what?

React Fiber is an ongoing reimplementation of React's core algorithm. It is the culmination of over two years of research by the React team.

why?

Adding an audit log to your Rails app

If you have any sort of administrative interface on your web site, you can easily imagine an intruder gaining access and mucking about. How do you know the extent of the damage? Adding an audit log to your app is one quick solution. An audit log should record a few things:

controller entry points with parameter values
permanent information about the user, like user_id
transient information about the user, like IP and user_agent

Using the Rails framework, this is as simple as adding a before_action to your admin controllers. Here’s a basic version that I’m using in production.

Guide for installing React Native on Linux (ubuntu 14.04)

Step 1: Install JDK 7

sudo apt-get install openjdk-7-jdk

	# This server demo does a socket hijack in Rack and then saves the socket to a global variable
	# to prevent it from being GCed when the Puma thread ends. It will then write "BEEP" to each
	# socket every ten seconds to prevent the connection timing out. During testing, it easily
	# handled up to 65523 connections, after which it ran into the `ulimit` for open file descriptors.
	# The bit with the waiting area is there because a normal `Set` is not thread safe and it would
	# drop socket due to race conditions. The `Queue` is thread safe and will make sure all sockets
	# are preserved.

	# run with `rackup -q -p 8000 -o 0.0.0.0 c10k.ru`
	# testing: install `ab` and then run `ab -c 20000 -n 20000 <ip adress of server>:8000/

	require 'bundler/inline'

	gemfile do
	source 'https://rubygems.org'
	gem 'pg'
	gem 'activerecord', '5.2.0'
	gem 'memory_profiler'
	gem 'benchmark-ips'
	end

	<?

	class leafFile extends leafBaseObject
	{
	const tableName = 'leafFiles';

	const defaultFolderMode = 0775; // rwx rwx r-x
	const defaultFileMode = 0666; // rw- rw- rw-
	const inputFieldSuffix = '_hash';

	<?php

	class fileManagerFacade {

	private $fileSync = null;
	private $elFinder = null;
	private $connector = null;

	private $rootDirName = 'files-manager';
	private $visibleFileTypes = [];

	<?php

	class leafFileSync{
	private $enableLog = false;

	public function __construct($logSynchronization = false){
	$this->enableLog = $logSynchronization;
	}

	public function sync($cmd, $result, $args, elFinder $elFinder, elFinderVolumeDriver $volume){

	class Person
	def name(n)
	@name = n
	self
	end
	def age(a)
	@age = a
	self
	end