Rodolfo Wilhelmy defvol

The reason why you might get certificate errors in Ruby 2.0 when talking HTTPS is because there isn't a default certificate bundle that OpenSSL (which was used when building Ruby) trusts.

Update: this problem is solved in edge versions of rbenv and RVM.

$ ruby -rnet/https -e "Net::HTTP.get URI('https://github.com')"
net/http.rb:917:in `connect': SSL_connect returned=1 errno=0 state=SSLv3
  read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)

You can work around the issue by installing a certificate bundle that you trust. I trust Mozilla and curl.

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:

Patched ruby 1.9.3-p327 for 30% faster rails boot

Overview

This script installs a patched version of ruby 1.9.3-p327 with boot-time performance improvements (#66 and #68), and runtime performance improvements (#83 and #84). It also includes the new backported GC from ruby-trunk.

Many thanks to funny-falcon for the performance patches.

Instructions

Enable ‘Run’ in the ‘Build’ section of your test bundle’s scheme. (See http://www.raingrove.com/2012/03/28/running-ocunit-and-specta-tests-from-command-line.html)

Install the Kicker tool and the dependencies

$ gem install kicker open4 colored xcodebuild-rb

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

	#!/usr/bin/env ruby
	#
	# Proof-of-Concept exploit for Rails Remote Code Execution (CVE-2013-0156)
	#
	# ## Advisory
	#
	# https://groups.google.com/forum/#!topic/rubyonrails-security/61bkgvnSGTQ/discussion
	#
	# ## Caveats
	#

	static NSInteger NSJSONReadingFuckNSNulls = (1UL << 3);

	@implementation NSJSONSerialization (FuckNulls)

	+ (void)load {
	Method originalMethod = class_getClassMethod(self, @selector(JSONObjectWithData:options:error:));
	IMP swizzledImplementation = imp_implementationWithBlock([^id (id _self, NSData _data, NSJSONReadingOptions _opt, NSError *_error){
	NSInputStream *stream = [NSInputStream inputStreamWithData:_data];
	[stream open];

	/*

	El mundo era tan reciente, que muchas cosas carecían de nombre,
	y para mencionarlas había que señalarlas con el dedo.
	Todos los años, por el mes de marzo, una familia de gitanos
	desarrapados plantaba su carpa cerca de la aldea, y con un
	grande alboroto de pitos y timbales daban a conocer los
	nuevos inventos.

	En un marzo volvieron los gitanos. Esta vez llevaban la sucesión

	class GradientView < UIView
	def initWithFrame(frame)
	if super
	rgb = CGColorSpaceCreateDeviceRGB()
	ptr = Pointer.new(:float, 8)
	ptr[0] = 1.0
	ptr[1] = 0.0
	ptr[2] = 0.0
	ptr[3] = 1.0
	ptr[4] = 0.0

	require "rubygems"
	require "sinatra"
	require "haml"
	require "mongo_mapper"

	class Shorten
	include MongoMapper::Document

	key :url, String
	key :shorten_id, String