mungruby

describe "Struct", "Struct.new" do
  context "initializing with a block" do
    it "should support the implementation defined in the block" do
      Struct.new("Person", :name, :gender, :age) do
        def to_s
          "Hi! My name is #{name} and I am a #{age} year old #{gender}."
        end
      end
      fred = Struct::Person.new("Fred", "male", 50)
      fred.to_s.should == "Hi! My name is Fred and I am a 50 year old male."

mungruby

v1 = 'a'
v2 = 'b'
v3 = 'c'

def splat(*args)
  puts 'splat'
  puts args
  args
end

mungruby

puts
puts self.inspect               # main
puts self.instance_of?(Object)  # true
puts "----"
 
def test_method
  "test"
end

mungruby

C:\projects\ruby\enumerable\inject>rspec inject_spec.rb -fdoc

Enumerable#inject
  Array
    should respond to #inject
  Hash
    should respond to #inject
  0..100 (a Range)
    should respond to #inject
  with an explicit subject

mungruby

Superhero = Struct.new :name, :origin, :nemesis, :nick_name

SuperHeroes = [ 
  Superhero.new("Batman", "Gotham City", "Joker", "Caped Crusader"),
  Superhero.new("Robin", "Gotham City", "Joker", "Boy Wonder"),
  Superhero.new("Superman", "Krypton", "Lex Luthor", "Kal El"),
  Superhero.new("Supergirl", "Krypton", "Bizzaro", "Kara Zor-El") ]

def display_superheroes *superheroes, &block

mungruby

class SomeClassVariables

  @@class_level_var = "class_level_var"
   
  def self.add_class_var
    @@class_method_var = "class_method_var"
  end

  def self.show_class_var

mungruby

attributes = %w[name species]
MyClass = Class.new do
  puts attributes
  attr_accessor *attributes
  define_method :initialize do |data|
    puts attributes
    puts data
    attributes.each_with_index do |attribute, idx|
      puts "#{idx} : #{attribute} : #{data[idx]}"
      self.__send__ "#{attribute}=", data[idx]

mungruby

attributes = %w[name species]
MyReadOnlyClass = Class.new do
  attr_reader *attributes
  define_method :initialize do |data|
    attributes.each_with_index do |attribute, idx|
      self.instance_variable_set "@#{attribute}", data[idx]
    end
  end
end
 

mungruby

class VariableArguments
  def initialize *args
    @first, @second, @third = *args
  end
end
 
v = VariableArguments.new
puts v.inspect
 
v = VariableArguments.new("Fred")

mungruby

members = %w[NAME ADDRESS]
members.map!(&:downcase)
members.map!(&:to_sym)

Customer = Struct.new(*members) do
  def print
    puts self.to_a.join(",")
  end
end