examples for rika

example_1.rb

class Person

  def speak
    puts "My name is #{@name}. I am a #{@occupation}."
  end

  def occupation(occupation)
    @occupation = occupation
  end

  def initialize(name)
    @name = name
  end
end

class House

  def residents
    @people.each do |person|
      person.speak
    end
  end

  def move_in(person)
    @people.push(person)
  end

  def initialize
    @people = Array.new
  end
end

# examples of how the above code works:
man = Person.new("Fred")
man.occupation("Garbage man")

home = House.new
home.move_in(man)

home.residents

example_2.rb

class Animal

  def speak
    if @type.eql?(:cat)
      puts "meow!"
    elsif @type.eql?(:dog)
      puts "woof!"
    end
  end

  def call(name)
    self.speak if @name.eql?(name)
  end

  def initialize(type)
    @type = type
  end
end

class Dog < Animal

  def initialize(name)
    @name = name

    super(:dog)
  end
end

class Cat < Animal

  def initialize(name)
    @name = name

    super(:cat)
  end
end

# examples of how the above code works:
dog = Dog.new('Fido')
dog.call('Fido')
dog.call('Spot')

cat = Cat.new('Mittens')
cat.call('Mittens')
cat.call('Garfield')

example_3.rb

string = String.new  # or name = ""
string.concat('Rika')    # => Rika
string.upcase    # => RIKA
string.downcase  # => rika
string.reverse   # => akiR
string.split('') # => ["R", "i", "k", "a"]

array = Array.new  # or array = []
array.push(1)  # => [1]
array.push(2)  # => [1, 2]
array.push(3)   # => [1, 2, 3]
array.reverse  # => [3, 2, 1]
array.first    # => 1
array.last     # => 3
array[0]       # => 1
array[1]       # => 2
array[2]       # => 3

hash = Hash.new # or hash = {}
hash['first'] = "Rika" # => { 'first' => 'Rika' }
hash['last'] = "Fama"  # => { 'first' => 'Rika', 'last' => 'Fama' }

hash['first']  # => Rika
hash['last']   # => Fama

hash['first_name'].reverse  # => akiR

array.push(name)    # => [1, 2, 3, { 'first' => 'Rika', 'last' => 'Fama' } ]
array.last          # => { 'first' => 'Rika', 'last' => 'Fama' }