From: lasitha <lasitha.ranatunga@...>
Date: 2009-03-26T02:19:24+09:00
Subject: Re: delete from array while iterating

On Wed, Mar 25, 2009 at 10:30 PM, RubyTalk@gmail.com <rubytalk@gmail.com> wrote:
> [2,3,4,5,6].delete_if{|x| (x%2==0) && (puts x) }
> 2
> 4
> 6

Err, that won't work.  puts returns nil so the block will never return
true and none of the items will be removed.


We'd have to do:

arr.delete_if do |e|
  if e.matches(condition)
    puts e
    true
  end
end

Note: this can work w/o an else because the whole if expression will
return nil if none of the conditions match.

cheers,
lasitha