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@dperini
dperini / regex-weburl.js
Last active June 18, 2026 13:06
//
// Regular Expression for URL validation
//
// Author: Diego Perini
// Created: 2010/12/05
// Updated: 2018/09/12
// License: MIT
//
// Copyright (c) 2010-2018 Diego Perini (http://www.iport.it)
//
@jboner
jboner / latency.txt
Last active September 22, 2026 04:04
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@andreyvit
andreyvit / tmux.md
Created June 13, 2012 03:41
tmux cheatsheet

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

@MohamedAlaa
MohamedAlaa / tmux-cheatsheet.markdown
Last active September 22, 2026 05:36
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname
@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active July 31, 2026 07:52
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
@yongkangchen
yongkangchen / ctags lua 规则增强
Last active October 29, 2021 11:21
ctags lua 规则增强
--regex-LUA=/^.*\s*function[ \t]*([a-zA-Z0-9_]+):([a-zA-Z0-9_]+).*$/\2/f,function/
--regex-LUA=/^.*\s*function[ \t]*([a-zA-Z0-9_]+)\.([a-zA-Z0-9_]+).*$/\2/f,function/
--regex-LUA=/^.*\s*function[ \t]*([a-zA-Z0-9_]+)\s*\(.*$/\1/f,function/
--regex-LUA=/([a-zA-Z0-9_]+) = require[ (]"([^"]+)"/\1/r,require/
--regex-LUA=/[ \t]{1}([a-zA-Z0-9_]+)[ \t]*[=][^=]/\1/v,variable/
--regex-LUA=/[ \t]*([a-zA-Z0-9_]+)[ \t]*=[ \t]*module_define.*$/\1/m,module/
--regex-LUA=/func_table\[ msg\.([A-Z_]+) \].+/\1/
@staltz
staltz / introrx.md
Last active September 17, 2026 13:53
The introduction to Reactive Programming you've been missing
@bensojona
bensojona / mraid.js
Created March 6, 2015 19:47
/*
Do not modify this version of the file. It will be copied over when any of the project's targets are built.
If you wish to modify mraid.js, modify the version located at mopub-sdk-common/mraid/mraid.js.
*/
(function() {
var isIOS = (/iphone|ipad|ipod/i).test(window.navigator.userAgent.toLowerCase());
if (isIOS) {
console = {};
console.log = function(log) {
var iframe = document.createElement('iframe');
@paulirish
paulirish / what-forces-layout.md
Last active September 20, 2026 01:24
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
@Heray
Heray / pbjs_amazon.html
Last active March 2, 2021 22:51
How to add Amazon as a custom prebid bidder in my site
<html>
<head>
<script>
var PREBID_TIMEOUT = 400;
var googletag = googletag || {};
googletag.cmd = googletag.cmd || [];