From: ara.t.howard@...
Date: 2006-10-06T23:07:58+09:00
Subject: Re: nil being empty

On Fri, 6 Oct 2006, Trans wrote:

> Ohad Lutzky wrote:
>> Show of hands - who thinks this is bad form?
>>
>> class NilClass
>>   def empty?; true; end
>> end
>
> Put your hands down. Notice that everyone that says it's bad form is doing
> so on purely ideological basis. I challenge them to show one good
> _practical_ case where it's truly "bad". And no, purposefully expecting a
> NoMethod error doesn't count --that IS bad form.

hash_of_lists = Hash.new{|h,k| h[k] = new_list}
hash_of_lists[:key] << 42 if hash_of_lists[:key].empty?

-a
-- 
in order to be effective truth must penetrate like an arrow - and that is
likely to hurt. -- wei wu wei