From: Vidar Hokstad <vidar.hokstad@...>
Date: 2006-11-26T00:15:06+09:00
Subject: Re: coding practise


sempsteen wrote:
> 1-) What does "Hash#has_key?" actually do?
> Why do we need such a method in spite of using the result of "Hash#[]"
> method which will return nil for a non-present key.

Because you won't know if a "nil" result from Hash#[] means that you
tried to access a non-existing key or if you accessed a key where the
_value_ is nil.

Vidar