smtalim

class Rubyist
  def welcome(*args)
    "Welcome " + args.join(' ')
  end
end
obj = Rubyist.new
puts(obj.send(:welcome, "famous", "Rubyists"))   # => Welcome famous Rubyists

smtalim

class ChessOpener
  def initialize
    @data = {}
    load_data
  end
  
  def self.load(filename)
    dsl = new
    dsl.instance_eval(File.read(filename))
  end

smtalim

# Here are some ways by which you can define an anonymous class

# 1
class Rubyist
  def self.who
    "Geek"
  end
end

# 2

smtalim

Free online courses at RubyLearning:

a. Ruby Metaprogramming 8th batch - 
http://rubylearning.com/blog/2013/02/08/a-free-ruby-metaprogramming-course-learn-to-think-in-ruby/

b. Sinatra 101 10th batch -
http://rubylearning.com/blog/2013/01/25/a-free-online-course-sinatra-101/

c. Programming the Web with Ruby 3rd batch -
http://rubylearning.org/classes/

smtalim

**  Creating Sinatra Extensions  **

Let us say that our app requires us to send both GET and POST requests to a particular URL such that the same block of code handles both verbs. It makes sense to define an extension that can handle our requirement, as we don’t want to define two routes with identical code.

Here is our code:

# post_get.rb
require 'sinatra/base'
module Sinatra
  module PostGet

smtalim

class MotorCycle
  def initialize(make, color)
    # Instance variables
    @make = make
    @color = color
  end
  def startEngine
    if (@engineState)
      'Engine is already Running'
    else

smtalim

class Display < MotorCycle
  def dispAttr
    'Color of MotorCycle is ' + @color
    'Make of MotorCycle is ' + @make
  end
end

smtalim

class Hiya
  def self.hiya
    "Hiya all!"
  end
end

smtalim

require 'ruboto/widget'
require 'ruboto/util/toast'

ruboto_import_widgets :Button, :LinearLayout, :TextView

# http://xkcd.com/378/

class QuickStartActivity
  def onCreate(bundle)
    super

smtalim

# myapp3_1.rb
require 'sinatra'

set :display_string, 'Welcome from RubyLearning again!'
before do
  @msg = 'Awesome!'
end

get '/' do
  settings.display_string + " " + @msg