gcatlin

brew update
brew versions FORMULA
cd `brew --prefix`
git checkout HASH Library/Formula/FORMULA.rb  # use output of "brew versions"
brew install FORMULA
brew switch FORMULA VERSION
git checkout -- Library/Formula/FORMULA.rb    # reset formula

## Example: Using Subversion 1.6.17
#

datagrok

This article is now published on my website: Prefer Subshells for Context.

sankitch

<meta property="og:title" content="{% if page.title %}{{ page.title }} - {% endif %}{{ site.title }}" />
<meta property="og:description" content="{{ description | strip_html | condense_spaces | truncate:150 }}" />
<meta property="og:url" content="{{ canonical }}" />
<meta property="og:image" content="{% if page.ogp_image %}{{ page.ogp_image }}{% else %}{{ site.default_ogp_image }}{% endif %}" />
<meta property="og:author" content="{{ site.author }}" />
<meta property="og:site_name" content="{{ site.title }}" />
<meta property="og:locale" content="{{ site.facebook_locale }}" />
<meta property="og:type" content="{% if page.index %}blog{% else %}article{% endif %}" />
<meta property="fb:app_id" content="{{ site.facebook_app_id }}" />

jboner

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

shamansir

// Excerpt from: https://github.com/Animatron/player/blob/master/anm.collisions.js

function edgeTest(p1, p2, p3, r2) {
    var rot = [ -(p2[1] - p1[1]),
                  p2[0] - p1[0] ];

    var ref = (rot[0] * (p3[0] - p1[0]) +
               rot[1] * (p3[1] - p1[1])) >= 0;

    for (var i = 0, il = r2.length; i < il; i+=2) {

HKLF4

# Title:
#		Octopress HTML5 Audio Tag
#		http://antoncherkasov.me/projects/octopress-plugins
# Author:
#		Anton Cherkasov
#		http://antoncherkasov.me
#		antoncherkasov@me.com
# Syntax:
#		{% audio url/to/mp3 %}
#		{% audio url/to/mp3 url/to/ogg %}

nikcub

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

zenorocha

Project Name

TODO: Write a project description

Installation

TODO: Describe the installation process

Usage

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

econchick

class Graph:
  def __init__(self):
    self.nodes = set()
    self.edges = defaultdict(list)
    self.distances = {}

  def add_node(self, value):
    self.nodes.add(value)

  def add_edge(self, from_node, to_node, distance):