lazyatom

How Should We Use Struct?

The Choice

It's common in Ruby to see some code setup a Struct like this:

class Specialized < Struct.new(:whatever)
  # ... define custom methods here...
end

lazyatom

Patched ruby 1.9.3-p194 for 30% faster rails boot

What is?

This script installs a patched version of ruby 1.9.3-p194 with patches for boot-time performance improvements (#66 and #68), and runtime performance improvements (#83 and #84). It also includes the new backported GC from ruby-trunk.

Huge thanks to funny-falcon for the performance patches.

• http://github.com/ruby/ruby/pull/66
• http://github.com/ruby/ruby/pull/68

lazyatom

require 'test/unit/assertions'
include Test::Unit::Assertions
assert_equal "1.9.2", RUBY_VERSION

# A Ruby meta-programming puzzle for polite programmers.

# This puzzle was created by Matt Wynne (@mattwynne) on 2011-04-10 inspired by Jim Weirich's
# talk at the Scottish Ruby Conference 2011.
#
# The challenge is: you have a class Foo which you want to monkey-patch, but politely.

lazyatom

class BetterNews
  def initialize(string, required)
    @age = required
    @string = string
  end

  attr_reader :age

  def method_missing(name, *args)
    self.class.new(@string.send(name, *args), @age)

lazyatom

# how do you test algorithms?

class Pythagoream < Struct.new(:a, :b)
  class BadArgument < ArgumentError; end
  def result
    raise BadArgument if a < 0 || b < 0
    a**2 + b**2
  end
end

lazyatom

module Rip
  module Commands
    # Runs ~/.rip/active/hooks/used after `rip use`
    # and ~/.rip/active/hooks/will-leave when moving to another env
    alias_method :rip_use, :use
    def use(*args)
      run_hook_if_exists('will-leave', Rip::Env.active)
      rip_use(*args)
      run_hook_if_exists('used', Rip::Env.active)
    end

lazyatom

module Rip
  module Commands
    # Runs ~/.rip/active/hooks/after-use after `rip use`
    # and ~/.rip/active/hooks/on-leave when moving to another env
    alias_method :rip_use, :use
    def use(*args)
      run_hook_if_exists('before-leave')
      rip_use(*args)
      run_hook_if_exists('after-use')
    end

lazyatom

➜  rip (file_conflicts)⚡ $ rip use empty; rip env delete test; rip env create test; rip install monk
ripenv: using empty
ripenv: deleted test
ripenv: created test
Successfully installed thor (0.11.5)
Some files from wycats-thor (0.11.5) conflict with those already installed by thor:
	lib/thor
	lib/thor/actions
	lib/thor/actions/create_file.rb
	lib/thor/actions/directory.rb

lazyatom

context "A user posting to a blog" do
  setup do
    @user = Factory(:user)
    @blog = Factory(:blog)
  end
  
  action do
    post :create, :user_id => @user.id, :id => @blog.id, :post => {:body => "Blah"}
  end
  

lazyatom

# Boom

Factory.define(:product) do |product| 
  product.handles do |p| # or whatever the has_many is called 
    Array.new(5) { x.association(:handle) } # return an array, as many as you like.
  end
  # etc
end