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Peter Sanford psanford

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@dbrady
dbrady / change_case.el
Created February 28, 2011 01:02
emacs lisp defuns to change the case (camelCase <-> snake_case) of the word under cursor, or an entire region if selected. NOTE: the snake-case defuns do not work, they just camelCase. Ooops.
;; Grateful thanks are given to Brian Marick (@marick) for helping me
;; write these. I got the original idea while reading through
;; http://xahlee.org/emacs/elisp_idioms.html, but couldn't work out
;; the elisp regexes. Brian Marick (@marick) stepped in and helped. He
;; took my tortured and broken camelcase-region and turned it into
;; something that actually worked. I then created
;; camelcase-word-or-region. I then wrote the snakecase versions but I
;; see now that all I did was copy the camelcase defuns over and,
;; meaning to go back and finish them Real Soon Now, forgot all about
;; them. I've had a quick look (2011-02-27) but elisp regexes are
@hSATAC
hSATAC / 256color.pl
Created July 20, 2011 14:48
256color.pl
#!/usr/bin/perl
# Author: Todd Larason <jtl@molehill.org>
# $XFree86: xc/programs/xterm/vttests/256colors2.pl,v 1.2 2002/03/26 01:46:43 dickey Exp $
# use the resources for colors 0-15 - usually more-or-less a
# reproduction of the standard ANSI colors, but possibly more
# pleasing shades
# colors 16-231 are a 6x6x6 color cube
for ($red = 0; $red < 6; $red++) {
@shamil
shamil / howto_deb_repackage.txt
Created July 19, 2012 03:29
Howto repackage deb packages
Use folowing steps to repackage dep package:
1: Extract deb package
# dpkg-deb -x <package.deb> <dir>
2: Extract control-information from a package
# dpkg-deb -e <package.deb> <dir/DEBIAN>
3. After completed to make changes to the package, repack the deb
# dpkg-deb -b <dir> <new-package.deb>
@benweint
benweint / gdb-stuck-ruby.txt
Created April 16, 2013 14:55
An example of how to gather C and Ruby backtraces from a stuck Ruby process using gdb.
# Here's the script I'll use to demonstrate - it just loops forever:
$ cat test.rb
#!/usr/bin/env ruby
loop do
sleep 1
end
# Now, I'll start the script in the background, and redirect stdout and stderr
@vishvananda
vishvananda / docker_netns.sh
Last active January 8, 2022 18:21
Expose the netns of a docker container to the host.
#!/usr/bin/env bash
if [ "$1" == "" ]; then
echo "usage: $0 <docker_id>"
echo "Exposes the netns of a docker container to the host"
exit 1
fi
ppid=`docker inspect $1 | grep Pid | awk '{print $2 + 0}'`
if [ "$ppid" == "" ]; then
echo "lxc parent pid not found"
@stopyoukid
stopyoukid / diff2html.sh
Last active April 12, 2025 15:23
Script that takes a git diff and outputs an html file in GitHub style
#!/bin/bash
#
# Convert diff output to colorized HTML.
# (C) Mitch Frazier, 2008-08-27
# http://www.linuxjournal.com/content/convert-diff-output-colorized-html
# Modified by stopyoukid
#
html="<html><head><meta charset=\"utf-8\"><title>Pretty Diff</title><style>body {text-align: center;}#wrapper {display: inline-block;margin-top: 1em;min-width: 800px;text-align: left;}h2 {background: #fafafa;background: -moz-linear-gradient(#fafafa, #eaeaea);background: -webkit-linear-gradient(#fafafa, #eaeaea);-ms-filter: \"progid:DXImageTransform.Microsoft.gradient(startColorstr='#fafafa',endColorstr='#eaeaea')\";border: 1px solid #d8d8d8;border-bottom: 0;color: #555;font: 14px sans-serif;overflow: hidden;padding: 10px 6px;text-shadow: 0 1px 0 white;margin: 0;}.file-diff {border: 1px solid #d8d8d8;margin-bottom: 1em;overflow: auto;padding: 0.5em 0;}.file-diff > div {width: 100%:}pre {margin: 0;font-family: \"Bitstream Vera Sans Mono\", Courier, monospace;font-size: 12px;line-height: 1.4em;text-indent: 0.5em;}.file {color:
@lelandbatey
lelandbatey / whiteboardCleaner.md
Last active December 3, 2025 02:16
Whiteboard Picture Cleaner - Shell one-liner/script to clean up and beautify photos of whiteboards!

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

@roxlu
roxlu / H264_Decoder.cpp
Created March 3, 2014 16:57
LibAV parser and decoder example with openGL (YUV420 -> RGB shader).
#include "H264_Decoder.h"
H264_Decoder::H264_Decoder(h264_decoder_callback frameCallback, void* user)
:codec(NULL)
,codec_context(NULL)
,parser(NULL)
,fp(NULL)
,frame(0)
,cb_frame(frameCallback)
,cb_user(user)
@trevnorris
trevnorris / perf-flame-graph-notes.md
Last active September 30, 2025 01:16
Quick steps of how to create a flame graph using perf

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0
@dutc
dutc / readelf,nm,objdump.md
Last active February 13, 2025 09:02

Linux可執行文件ㄉ內容分析工具

NOTE: This is a working copy. This tutorial is unfinished and may contain inaccuracies.

I've written the title of this tutorial in Chinese, as I suspect that its contents may, at first glance, appear similarly incomprehensible to the audience.

However, just as I can sketch for you the following...

可執行文件 = (可 = can) + (執行 = execute) + (文件 = file) = executable (file)