wilson

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

class Thing
  attr_accessor :timestamp
  def initialize(timestamp)
    @timestamp = timestamp
  end

wilson

### running this code: http://gist.github.com/234170

### jruby trunk from last week
> jruby sorting.rb
Rehearsal ---------------------------------------------
merge:      1.070000   0.000000   1.070000 (  1.070000)
nocopy:     0.730000   0.000000   0.730000 (  0.730000)
------------------------------------ total: 1.800000sec

                user     system      total        real

wilson

本拠> bin/rbx ../sorting.rb
Rehearsal ---------------------------------------------
merge:      2.448515   0.000000   2.448515 (  2.448516)
nocopy:     0.896591   0.000000   0.896591 (  0.896639)
------------------------------------ total: 3.345106sec

                user     system      total        real
merge:      0.855341   0.000000   0.855341 (  0.855353)
nocopy:     0.569976   0.000000   0.569976 (  0.569993)

wilson

x,y,z = "X ", "Y ", "Z "
[x,y,z].each_with_index do |str, i|
  str << str[0,1]
  p str
  redo if i == 1
end

wilson

puts "ruby version: #{RUBY_VERSION}"
pass = 0
proc do |@x|
  pass += 1
  puts "proc pass number #{pass}"

  @x = 3 if pass == 1

  puts "proc x is: #{@x}"
  redo if pass != 2

wilson

module IncludeMe;end
module BehindTheScenes;end

# Include IncludeMe in a module
module One
  include IncludeMe
end

# Add an ancestor to IncludeMe
module IncludeMe

wilson

Process:         vm [69929]
Path:            /Users/wilson/code/rbx/vm/vm
Identifier:      vm
Version:         ??? (???)
Code Type:       X86-64 (Native)
Parent Process:  zsh [37874]

Date/Time:       2009-11-22 04:23:08.915 -0500
OS Version:      Mac OS X 10.6.2 (10C540)
Report Version:  6

wilson

# shortcut method for opening a metaclass on the receiver
module Kernel;def m;class << self;self;end;end;end

Module.m # #<Class:Module>, metaclass of Module
Module.m.superclass # Class, because that is how Module is bootstrapped

Module.m.m # #<Class:#<Class:Module>>, metaclass of Module's metaclass
Module.m.superclass # #<Class:#<Class:Module>>
Module.m.m.superclass # #<Class:#<Class:Module>>
# Opening a metaclass on Module's metaclass changes its superclass to be the same as its metaclass's superclass!?

wilson

(gdb) rp already_meta->true_superclass(state)
#<Module(Class):0x101225df0>
  name: :Module
  superclass: #<Object(Class):0x101225d70>
  constants: #<Rubinius::LookupTable:0x1014010a0>
  method_table: #<Rubinius::MethodTable:0x101401170>: 18
    :constant_table, :direct_superclass, :attr_writer, :protected, :alias_method, :module_function, :const_set, :encloser, :name, :append_features, :included, :attr_accessor, :const_missing, :include, :method_table, :superclass=, :attr_reader, :private
  >
>
$2 = void

wilson

Breakpoint 1, rubinius::MetaClass::attach (state=0x101204b00, obj=0x101226220, sup=0x0) at vm/builtin/class.cpp:204
204	
(gdb) rp already_meta
#<MetaClass:Class Object:0x101226220>
$1 = void
(gdb) rp already_meta->superclass()
#<Class(Class):0x101225c70>
  name: :Class
  superclass: #<Module(Class):0x101225df0>
  constants: #<Rubinius::LookupTable:0x101400ed0>