gaearon

If you haven’t worked with JavaScript in the last few years, these three points should give you enough knowledge to feel comfortable reading the React documentation:

• We define variables with let and const statements. For the purposes of the React documentation, you can consider them equivalent to var.
• We use the class keyword to define JavaScript classes. There are two things worth remembering about them. Firstly, unlike with objects, you don't need to put commas between class method definitions. Secondly, unlike many other languages with classes, in JavaScript the value of this in a method [depends on how it is called](https://developer.mozilla.org/en-US/docs/Web/Jav

carousel

<?php

function camel_to_snake($input)
{
    return strtolower(preg_replace('/(?<!^)[A-Z]/', '_$0', $input));
}
function snakeToCamel($input)
{
    return lcfirst(str_replace(' ', '', ucwords(str_replace('_', ' ', $input))));
}

steven2358

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

felipepodesta

#!/bin/bash
# @author: Seb Dangerfield
# http://www.sebdangerfield.me.uk/?p=513 
# Created:   11/08/2011
# Modified:   07/01/2012
# Modified:   17/05/2012
 
# Modify the following to match your system
NGINX_CONFIG='/etc/nginx/sites-available'
NGINX_SITES_ENABLED='/etc/nginx/sites-enabled'

malthe

#!/bin/bash

if [ ! -d $1 ]; then
    echo "Not a directory: $1"
    exit -1
fi

while read line; do
   filename="$(basename $line)"
   if [ "${filename##*.}" == "less" ]; then