Shamaoke

# Difference between dup and clone in Ruby

class Example
  attr_accessor :str, :arr
end

s1 = Example.new

s1.str = 'ok!'
s1.arr = [1, 2, 3]

Shamaoke

Scenario: Creating a user when another user with the same surname exists
  Given a user with "name" = "Ross" and "surname" = "Geller" exists
  When I create a user with "name" = "Monica" and "surname" = "Geller"
  Then 2 users with "surname" = "Geller" should exist
  And the only user with "name" = "Ross" should exist
  And the only user with "name" = "Monica" should exist

Shamaoke

# module
require 'digest/sha2'

module Extensions
  module Authentication
    extend ActiveSupport::Concern

    module ClassMethods
      def find_and_authenticate(attributes)
        @user.authenticate(attributes[:password]) if @user = find_by_email(attributes[:email])

Shamaoke

# Schema Information
#
# Table name: users
#
#      id: integer
#    name: string
# surname: string

class User < ActiveRecord::Base
  def full_name=(full_name) # a virtual attribute

Shamaoke

# encoding: utf-8

class Example
  private
    def one
      'ok!'
    end
  public
    def two
      'ok too!'

Shamaoke

// ross.js
this.ross = {
  name:    'Ross',
  surname: 'Geller',
  get_name:     function() { return this.name },
  get_surname:  function() { return this.surname },
  get_fullname: function() { return this.name + ' ' + this.surname }
}

this.module = module

Shamaoke

# ruby child | ruby parent
IO.popen('-') do |io|
  if io # run in the current process
    puts io.read.upcase
  else # run in the child process
    $>.puts 'ok!'
  end
end

# ruby child | ruby parent

Shamaoke

class Example
  constructor: (@counter, @final, @id = null) ->
  prepare: (meth) -> @id = setInterval(meth, 1000); return
  count: =>
    console.log @counter
    @counter += 1
    clearInterval @id if @counter is @final
    return
  start: -> @prepare @count; return
  @new: -> new @ 0, 10

Shamaoke

class Example
  constructor: (@counter, @final) ->
  count: ->
    setTimeout =>
      console.log @counter
      @counter += 1
      @count() unless @counter is @final
    , 1000
  @new: -> new @ 0, 10

Shamaoke

# class
class Singleton
  constructor: ->
    throw new Error 'Singleton error' if @.constructor is Singleton or @.constructor._instance
    @.constructor._instance = @
  @instance: (arg...) ->
    unless @._instance
      new @ arg...
    else
      @._instance