From: "Gábor SEBESTYÉN" <segabor@...>
Date: 2005-06-20T23:31:09+09:00
Subject: Re: Iterate with condition

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On 2005.06.20., at 14:10, Robert Klemme wrote:

> What exactly do you want to do with the collection?
>
I want to get the first N pieces of "valid" objects from a =20
collection. I would iterate in collection counting how many objects =20
were sucessfully accepted and would break the cycle if there are no =20
more objects or I already have my N objects. Here's my solution =20
(written for Rails and the collection consists of ActiveRecord objects):

         cl =3D CustomerQueue.find(:all, :conditions =3D> cond, :order =
=3D> =20
"created_at ASC")

         i =3D 0
         while i < cl.size and n > 0
             c =3D _openChat(cl[i].customer_id, @session[:user].id)
             unless c.nil?
                 chats << c
                 n =3D n - 1
             end
         end

I don't like referencing by index. That's why I asked you how to =20
implement this using iterator and not a simple while cycle with =20
indexing.

G=E1bor


"Never trust a computer you can't throw out a window." - Steve Wozniak


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