From: Robert Klemme <bob.news@...>
Date: 2006-02-06T01:13:20+09:00
Subject: Re: Ruby feature request - enum.detect_index

James Edward Gray II <james@grayproductions.net> wrote:
> On Feb 5, 2006, at 9:48 AM, Robert Klemme wrote:
>
>> Yukihiro Matsumoto <matz@ruby-lang.org> wrote:
>>> Hi,
>>> In message "Re: Ruby feature request - enum.detect_index"
>>>    on Sun, 5 Feb 2006 23:43:19 +0900, "jonT" <j@Tippell.com> writes:
>>>> detect works great but doesn't supply the index of the match. It
>>>> would be nice to have a method detect_index that returned the index
>>>> rather than the object.
>>> Nice idea.  I'd rather name it 'find_index' though.
>>
>> Don't we have that already?
>>
>>>> %w{foo bar baz}.index "baz"
>> => 2
>>
>> Or am I missing something?
>
> You can not use a block of Ruby code to select the item you would
> like an index for, in this example.

Good point.  In that case I'd just change the implementation of #index to 
either accept an argument or a block.  This cannot break old code because at 
the moment blocks are not permitted / ignored.

Kind regards

    robert