overloadable-if.rb

class Object
  def if
    yield if self
  end
  
  def else
    yield if not self
  end
end

true.if do
  puts 'this is true, you will hear from me'
end

false.if do
  puts 'you will not hear from me'
end

nil.if do
  puts 'nor me'
end

nil.else do
  puts 'but i will make some noise here'
end