slawosz

def foo(bar, &baz)
  baz.call(bar)
end

foo "bar" do |bar|
  puts bar
end

foo("bar", lambda{|baz| puts bar })

slawosz

class Programmer < ActiveRecord::Base
  has_many :assignments
  has_many :projects, :through => :assignments
end

class Programmer < ActiveRecord::Base
  has_many :projects, :through => :assignments
end

slawosz

#= require jquery
#= require jquery_ujs
#= require lib/modernizr
#= require lib/jquery.lettering
#= require_tree .

$ ->
  $('*[data-googlemap]').googleMap()
  true

slawosz

Change all 1.8 hashes to 1.9: `find -name '*.*rb' | xargs sed -i 's/:\([a-zA-Z_1-9]\+\) => /\1: /g'`

slawosz

Patched ruby 1.9.3-p0 for 30% faster rails boot

What is?

This script installs a patched version of ruby 1.9.3-p0 with patches to make ruby-debug work again (#47) and boot-time performance improvements (#66 and #68), and runtime performance improvements (#83 and #84).

Huge thanks to funny-falcon for the performance patches.

• http://github.com/ruby/ruby/pull/47
• http://github.com/ruby/ruby/pull/66

slawosz

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCS3+74pH+rMQyzqxnvxRJkvRG+Bw6+6yVddiik7CBMpexCLzCLQ2JYC+3eXE34zZHg63zRJx1mg3gC/5EPHLuJnbze+nNu9eSZYw1/xc+muspHGg8gNLSiSFl11HbM3xXC67UUUNgRo0gzH9LRbA31OzREygASTZnWFgLoYAAWtU+fK6Fm0Sy7PIUdQVbGDM10loCFloyfbBlimqRPsSbMkCyqInJ64pU7LXzE8HMGnmPMfUHc2AXuWbQQfJGBsepL/+Xo3m1a2hMHGRCa9ZT9lL3R1VEflXENH/yUzfGiTaXitJ+WT/XOAA+yb4QY/cQgndvWP/lB04TN2BK9KgxF slawosz@gmail.com

slawosz

class SimpleCalculator
  def initialize(i)
    @i = i
  end

  def calculate
    @i * 6
  end
end

slawosz

 def sum(f: Int => Int)(a: Int, b: Int): Int = {
   if (a > b) 0
   else f(a) + sum(f)(a + 1, b)
 }

 def product(f: Int => Int)(a: Int, b: Int): Int = {
   if (a > b) 1
   else f(a) * product(f)(a + 1, b)
 }

slawosz

# instead
shared_examples_for "ApplicationController" do |params|
  it "should complain about missing parameters" do
    params.each_key do |key|
      result = request_proc.call(params.except(key))
      result.should be_bad_request
    end
  end
end

slawosz

Patch for ruby 1.9.3-p327 is here: https://gist.github.com/4063779

Patched ruby 1.9.3-p286 for 30% faster rails boot

Overview

This script installs a patched version of ruby 1.9.3-p286 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.