Ruby Object Model Exercise #3

case.rb

character = ''

case character
when "^"
  puts 'It is a caret'
when ">"
  puts 'It is a greater than'
else
  puts "You can't even use a computer!"
end

class String
  DICTIONARY = {
    "^" => Proc.new{ puts "it's a carat" },
    ">" => Proc.new{ puts "it's a greater or less than sign" }
  }

  def check
    if DICTIONARY[self]
      DICTIONARY[self].call
    else
      puts "You can't even use a computer!"
    end
  end
end

"^".check
">".check
" ".check

class BasicObject
  def add(key, &blk)
    @my_at||=::Hash.new
    @my_at[key] = blk
  end

  def at(key)
    @my_at||=::Hash.new
    @my_at[key].call if @my_at[key]
  end

end

map = Hash.new

map.add("^") { puts 'It is a caret' }
map.at("&")
map.at("^")