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@cdown
cdown / gist:1163649
Last active July 7, 2025 00:58
Bash urlencode and urldecode
urlencode() {
# urlencode <string>
old_lc_collate=$LC_COLLATE
LC_COLLATE=C
local length="${#1}"
for (( i = 0; i < length; i++ )); do
local c="${1:$i:1}"
case $c in
@MatthewEppelsheimer
MatthewEppelsheimer / hack.sh
Created March 31, 2012 23:00 — forked from erikh/hack.sh
OSX Settings
#!/usr/bin/env sh
##
# This is script with usefull tips taken from:
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
# curl -sL https://raw.github.com/gist/2269385/a714e0e69ba99936f914ade0083709dcca6f8438/hack.sh | sh
#
@jboner
jboner / latency.txt
Last active September 16, 2025 11:31
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
@MohamedAlaa
MohamedAlaa / tmux-cheatsheet.markdown
Last active September 17, 2025 08:34
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname
@NapoleonWils0n
NapoleonWils0n / ffmpeg combine files.sh
Created November 4, 2012 00:26
ffmpeg: combine seperate audio and video files into a single video
#!/bin/sh
# ffmpeg combine seperate audio and video files into a single video
# copy the audio and video tracks
ffmpeg -i audio.aiff -i video.mov -acodec copy -vcodec copy -f mp4 avcombined.mp4
# encode the audio as aac and copy the video track without encoding it. if its the h264 codec
ffmpeg -i audio.aiff -i video.mov -acodec libfaac -ac 2 -ar 48000 -ab 160k -vcodec copy -f mp4 avcombined.mp4
@yayj
yayj / client.cpp
Created April 27, 2013 05:48
ASIO ping-pong test modification for io_service per thread.
//
// client.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
@XVilka
XVilka / TrueColour.md
Last active September 10, 2025 20:12
True Colour (16 million colours) support in various terminal applications and terminals

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

@reterVision
reterVision / trie.cc
Created January 18, 2014 08:39
A simple Trie implementation in CPP.
#include <iostream>
#include <string>
#include <map>
#include <vector>
using namespace std;
struct Node {
char ch;
map<char, Node*> children;
@rmondello
rmondello / gist:b933231b1fcc83a7db0b
Last active February 5, 2025 03:03
Exporting (iCloud) Keychain and Safari credentials to a CSV file

Exporting (iCloud) Keychain and Safari credentials to a CSV file

Update (October 2021)

Exporting password + one-time code data from iCloud Keychain is now officially supported in macOS Monterey and Safari 15 (for Monterey, Big Sur, and Catalina). You can access it in the Password Manager’s “gear” icon (System Preferences > Passwords on Monterey, and Safari > Passwords everywhere else), or via the File > Export > Passwords... menu item). You shouldn't need to hack up your own exporter anymore.

Original, Obsolete Content (2014)

After my dad died, I wanted to be able to have access any of his online accounts going forward. My dad was a Safari user and used iCloud Keychain to sync his credentials across his devices. I don’t want to have to keep an OS X user account around just to access his accounts, so I wanted to export his credentials to a portable file.

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.