joel

#!/usr/bin/env ruby
require 'benchmark'

N = 1000000

class TestingObjectTap
  def ugly  
    results = {}  
    [:x, :y, :z].each do |letter|  
      results[letter] = rand(100)  

joel

require 'benchmark'

class Foo
  def initialize
    @bar = rand(100) # for caching
  end
  def bar
    @bar ||= rand(100)
  end
end

joel

# Not override -E option or LANG and apply only for ruby > 1.9
if Object.const_defined?(:Encoding) && !ENV['LANG'] && !ENV['RUBYOPT'].include?('-E')
  Encoding.default_internal = 'utf-8'
  Encoding.default_external = 'utf-8'
end
require ::File.expand_path('../config/environment',  __FILE__)

joel

require 'benchmark'

N = 70000

Benchmark.bmbm do |x|
  x.report('foo + bar') { N.times {
    'foo' + 'bar'
  } }
  x.report('#{foo}#{bar})') { N.times {
    "#{'foo'}#{'bar'}"

joel

http://guides.rubygems.org/make-your-own-gem/

rvm use ruby-1.9.3-p0@lorem --create
echo "rvm use ruby-1.9.3-p0@lorem --create" >> lorem/.rvmrc
bundle gem lorem

gem build lorem.gemspec
git tag -a v0.0.1 -m 'version 0.0.1'
git push --tags
gem push lorem-0.0.1.gem

joel

My gist

joel

require 'benchmark'

N = 10000

ARRAY = begin
  [].tap do |array|
    (1..1000).to_a.each do |entry|
      array << '' if rand(5) == 0
      array << entry.to_s
    end

joel

require 'rubygems'

# Set up gems listed in the Gemfile.
ENV['BUNDLE_GEMFILE'] ||= File.expand_path('Gemfile', __FILE__)
require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])
require 'rails/all'

N = 10000000
EMPTY_STRING = ''

joel

# mate ~/.irbrc

#!/usr/bin/env ruby

if defined? Rails
  begin
    require 'factory_girl'
    Dir[Rails.root.join("spec/factories/**/*.rb")].each { |f| require f }
  rescue LoadError
  end

joel

#!/usr/bin/env ruby

class CleaningHomeBrew
  
  # Your binaries unlinked
  BINARIES = ['cmake', 'imagemagick', 'jasper', 'jpeg', 'libevent', 'libtiff', 'little-cms','memcached','mysql','ossp-uuid','pidof','postgresql','redis','sphinx','wget']
  
  class << self
    
    def clean