Hello

I have found following statement in date.rb:
  def <=> (other)
	  case other
	  when Numeric; return @ajd <=> other
	  when Date;    return @ajd <=> other.ajd
  end
	  raise TypeError, 'expected numeric or date'
  end
	
So I can't compare a date with nil, because I get an error. Instead I
have to write something like date.instance_of? NilClass, which is
something unnecessary complicated.

Why is this implemented this way?

-- 
Marek Janukowicz