dmitryelastic

#  http://gist.github.com/16885

#  $ ./script/console 
#  Loading development environment (Rails 2.1.0)
#  >>
#  >> User.whatis :create!
#  File: /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/validations.rb:876
#  872:             end  
#  873:         
#  874:             # Creates an object just like Base.create but calls save! instead of save  

banister

module YCombinator
    def y_comb(&generator)
        ->(x){ 
            ->(*args){ 
                generator.(x.(x)).(*args)
            }
        }.(->(x){
            ->(*args){ 
                generator.(x.(x)).(*args)
            }

chad

typedef struct {
    VALUE *pc;			/* cfp[0] */
    VALUE *sp;			/* cfp[1] */
    VALUE *bp;			/* cfp[2] */
    rb_iseq_t *iseq;		/* cfp[3] */
    VALUE flag;			/* cfp[4] */
    VALUE self;			/* cfp[5]  / block[0] */
    VALUE klass;		/* cfp[6]  / block[1] */
    VALUE *lfp;			/* cfp[7]  / block[2] */
    VALUE *dfp;			/* cfp[8]  / block[3] */

myobie

module Scope
  module ScopeMethods
    def helpers(&block)
      instance_eval(&block)
    end
  end

  def scope(path, &block)
    (@path_parts ||= []) << path

banister

module Recipe
  def eggs(num=nil)
    num ? @eggs = num : @eggs
  end

  def vinegar(num=nil)
    num ? @vinegar = num : @vinegar
  end
end

banister

VALUE
rb_singleton_class_clone(VALUE obj)
{
    VALUE klass = RBASIC(obj)->klass;

    if (!FL_TEST(klass, FL_SINGLETON))
	return klass;
    else {
	struct clone_method_data data;
	/* copy singleton(unnamed) class */

osdezwart

=begin
/***************************************************************************
 *   Copyright (C) 2006, Paul Lutus                                        *
 *   Copyright (C) 2008, Antono Vasiljev                                   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *

banister

# Perl Moose example in Ruby, Perl code found here: http://www.perlmonks.org/?node_id=656019

class Module
  # has and after do not exist in Ruby OOTB, so we define them here:
  def has(options)
      options.each_pair do |k, v|
        singleton_class.send(:attr_accessor, k)
        instance_variable_set("@#{k}", v)
    end
  end

banister

### Defining some Moose-like functionality
class Module
  def has(options)
      options.each_pair do |k, v|
        singleton_class.send(:attr_accessor, k)
        self.send("#{k}=", v)
    end
  end
  
  def after(meth, &after_block)

banister

# Traits in Ruby:

module M
  def self.included(c)
    c.class_eval do
      instance_methods.each do |m|
        alias_method m, m
      end
    end
    c.uninclude(self)