jjb

In my previous post I described how to securely acquire the Mozilla list of root certificates and convert them to a form usable by curl and various libraries which don't ship with them.

Next, I want to point Net:HTTP at this file library-wide, so that it is used by all invocations of methods accessing https resources (in particular, Kernel#open, which in ruby 1.8.7 does not have a ca_file option and is therefore unusable with https). I hunted around the ruby standard library for a couple hours and came up with this:

require 'open-uri'
require 'net/https'

module Net
 class HTTP

waynezhang

<div id='tag_cloud'>
{% for tag in site.tags %}
<a href="#{{ tag[0] }}" title="{{ tag[0] }}" rel="{{ tag[1].size }}">{{ tag[0] }}</a>
{% endfor %}
</div>

<ul id='tag_list'>
{% for tag in site.tags %}
  <li class='tag_item' id='{{ tag[0] }}'>
    <span class='tag_name'>{{ tag[0] }}</span>

padde

# Chained comparisons in Ruby
# inspired by http://coffeescript.org/#comparisons
# as well as http://refactormycode.com/codes/1284

[:<, :>, :<=, :>=].each do |operator|
  [Float, Fixnum, Rational, Comparable].each do |klass|
    klass.class_eval do
      alias_method "_#{operator}", operator
      define_method operator do |rhs|
        send("_#{operator}", rhs) && rhs

trey

Creating a Happy Git Environment on OS X

Step 1: Install Git

brew install git bash-completion

Configure things:

git config --global user.name "Your Name"

git config --global user.email "you@example.com"

hellerbarde

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

ubermajestix

# When an RSpec test like this fails,
# 
#   @my_array.should == [@some_model, @some_model2]
# 
# RSpec will call inspect on each of the objects to "help" you figure out
# what went wrong. Well, inspect will usually dump a TON OF SHIT and make trying
# to figure out why `@my_array` is not made up of `@some_model` and `@some_model2`.
#
# This little module and technique helps get around that. It will redefine `inspect`
# if you include it in your model object. 

masonforest

Installing a Gem on Heroku from a Private GitHub Repo

Sometimes you want to use a gem on Heroku that is in a private repository on GitHub.

Using git over http you can authenticate to GitHub using basic authentication. However, we don't want to embed usernames and passwords in Gemfiles. Instead, we can use authentication tokens.

1. Get an OAuth Token from GitHub

---

First you will need to get an OAuth Token from GitHub using your own username and "note"

kugaevsky

#!/bin/sh

echo "NB! This process could be too destructive sometimes and you may need to run 'bundle' command from your project directory."
echo "Do you want to cleanup all gemsets?"
read -p "(anything other than 'yes' will cancel) > " ANSWER

if [[ $ANSWER != "yes" ]]
  then
    echo "Phew...\nMay be another day."
  else

shantanusingh

sudo yum update

##Install Redis https://gist.github.com/dstroot/2776679

wget https://raw.github.com/gist/2776679/04ca3bbb9f085b192f6aca945120fe12d59f15f9/install-redis.sh
chmod 777 install-redis.sh
./install-redis.sh

marianposaceanu

Linux fun-o-matic

How to have some fun using the terminal.

1. Install cowsay [0] via : sudo apt-get install cowsay
2. Install fortune [1] via : sudo apt-get install fortune
3. Make sure you have Ruby installed via : ruby -v
4. Install the lolcat [2] via : gem gem install lolcat
5. Profit!