Muhammad Ashraf Ishak vandershraaf

CSS Selectors Cheatsheet

Hi! If you see an error or something is missing (like :focus-within for few years :P) please let me know ❤️

Element selectors

Element -- selects all h2 elements on the page

h2 {

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	### /etc/nginx/sites-available/default
	server {

	listen 80 default_server;
	listen [::]:80 default_server;

	root /var/www/html;

	index index.html index.htm index.php;

	<?php
	function require_auth() {
	$AUTH_USER = 'admin';
	$AUTH_PASS = 'admin';
	header('Cache-Control: no-cache, must-revalidate, max-age=0');
	$has_supplied_credentials = !(empty($_SERVER['PHP_AUTH_USER']) && empty($_SERVER['PHP_AUTH_PW']));
	$is_not_authenticated = (
	!$has_supplied_credentials \|\|
	$_SERVER['PHP_AUTH_USER'] != $AUTH_USER \|\|
	$_SERVER['PHP_AUTH_PW'] != $AUTH_PASS

	#!/usr/bin/env python

	"""

	Twitter's API doesn't allow you to get replies to a particular tweet. Strange
	but true. But you can use Twitter's Search API to search for tweets that are
	directed at a particular user, and then search through the results to see if
	any are replies to a given tweet. You probably are also interested in the
	replies to any replies as well, so the process is recursive. The big caveat
	here is that the search API only returns results for the last 7 days. So

	package pt.impresa.iweb.filters.request;

	import java.io.IOException;
	import java.text.Normalizer;
	import java.util.Collections;
	import java.util.Enumeration;
	import java.util.HashMap;
	import java.util.Map;
	import java.util.Set;
	import java.util.regex.Pattern;