arwagner

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions into the /Users/andrewwagner/.rvm/gems/rbx-head-head-master directory.

arwagner

rvm rubies

   jruby-1.6.4 [ darwin-x86_64-java ]
   rbx-master [ x86_64 ]
=> ruby-1.8.7-p352 [ x86_64 ]
   ruby-1.9.2-p290 [ x86_64 ]

new-host-3% sudo uninstall rbx-master
sudo: uninstall: command not found
new-host-3% sudo rvm uninstall rbx-master

arwagner

new-host-3% rvm install rbx
rbx-head installing #dependencies 
Cloning git://github.com/rubinius/rubinius.git
mkdir: /Users/andrewwagner/.rvm/log/rbx-head: Permission denied
touch: /Users/andrewwagner/.rvm/log/rbx-head/rbx.repo.log: No such file or directory
/Users/andrewwagner/.rvm/scripts/functions/utility: line 152: /Users/andrewwagner/.rvm/log/rbx-head/rbx.repo.log: No such file or directory
/Users/andrewwagner/.rvm/scripts/functions/utility: line 159: /Users/andrewwagner/.rvm/log/rbx-head/rbx.repo.log: No such file or directory
ERROR: Error running 'git clone --depth 1 git://github.com/rubinius/rubinius.git /Users/andrewwagner/.rvm/repos/rbx-head', please read /Users/andrewwagner/.rvm/log/rbx-head/rbx.repo.log
Could not fetch git://github.com/rubinius/rubinius.git - trying http://github.com/rubinius/rubinius.git
Cloning http://github.com/rubinius/rubinius.git

arwagner

new-host-3% rvm install rbx
rbx-head installing #dependencies 
Cloning git://github.com/rubinius/rubinius.git
Copying from repo to source...
rbx-head - #configuring
rbx-head - #compiling
rbx-head - adjusting #shebangs for (erb ri rdoc).
rbx-head - #importing default gemsets (/Users/andrewwagner/.rvm/gemsets/)
WARN: rbx rbx-head-head is not installed.
To install do: 'rvm install rbx-head-head'

arwagner

require 'rspec'
require "rspec/core/rake_task"

RSpec::Core::RakeTask.new(:core) do |t|
  t.rspec_opts = "-t ~foo"
end

describe "foo", :foo => true do
  it "should be awesome" do
    puts "foooooo!"

arwagner

>> class Foo; def a; end; end
=> nil
>> class Bar < Foo; def a; super; end; end
=> nil
>> Bar.new.a
=> nil

arwagner

/Users/andrewwagner> which ruby
ruby not found
/Users/andrewwagner> rvm list

rvm rubies

   ruby-1.9.2-p290 [ i386 ]

/Users/andrewwagner> rvm use 1.9.2
Using /Users/andrewwagner/.rvm/gems/ruby-1.9.2-p290

arwagner

class ProceduralFiveDigits
  def initialize
    @new_population = Array.new(100) { generate_individual }
    reset
  end

  def evolve
    1000.times do
      100.times do
        @parent_a, @parent_b = [pick_individual, pick_individual]

arwagner

I found http://groups.google.com/group/growing-object-oriented-software/browse_thread/thread/47695af2c6b5adda fascinating, so I decided to make it a little more concrete. It's also in ruby using rspec, sorry about that. Here's the code under test:

class EligibleForDiscountPolicy
  def initialize transaction, user
    @transaction = transaction
    @user = user
  end

  def decide
    return true if @user.is_gold_member?

arwagner

class Foo
  def not
    3
  end
end

Foo.new.instance_eval { not } #=> syntax error, unexpected '}'
Foo.new.instance_eval { not() } #=> true
Foo.new.send :not #=> 3