From: Trans <transfire@...>
Date: 2005-04-10T04:19:40+09:00
Subject: Re: Array#last_index

> Can you not just use -1 as the index?

No. Because, it is not always simply a matter of getting to the last
element. If it were then #last itself would suffice. The use case here
is when the last index is needed.

T.