Ruby

First Step

Call Ruby command line

irb

Methode

• Define a methode "m"

def m(name = "World")
puts "Hello Mr #{name.capitalize}!"
end

• Execute

m("nicolas")

Hello Mr Nicolas!
=> nil

Class

class Greeter
  def initialize(name = "World")
   @name = name
  end
  def say_hi
    puts "Hi #{@name}!"
  end
  def say_bye
    puts "Bye #{@name}, come back soon."
   end
end

• class define a new class
• @name is a variable d'instance

Object

irb>o = Greeter.new("Nicolas")
=> #<Greeter:0x00000002579a48 @name="Nicolas">

irb>o.say_hi
Hi Nicolas!
=> nil

irb> o.say_bye
Bye Nicolas, come back soon.
=> nil