From: Yukihiro Matsumoto <matz@...>
Date: 2005-12-10T11:29:52+09:00
Subject: Re: next, retry, break?

Hi,

In message "Re: next, retry, break?"
    on Sat, 10 Dec 2005 05:59:29 +0900, mental@rydia.net writes:

|Okay, I've got a question.
|
|What's the correct way to implement a custom Enumerable#each which
|handles next, retry and break correctly?

Just do it normally.  You don't have to do nothing for them.

|For example:
|
| def each
|   while @current_grob
|     yield @current_grob.create
|     @current_grob = @current_grob.next_grob
|   end
| end
|
|How do I make next, retry, and break work as expected?

If you want "redo" to work, you have to initialize your @current_grob
at the beginning of the iterating method.  Since many expect "each" to
enumerate all the values in the collection, initializing at the top is
a good thing in general.

							matz.