From: matz@... (Yukihiro Matsumoto)
Date: 2001-12-13T16:03:14+09:00
Subject: [ruby-talk:28392] [RCR] IO.select should return array for timeout.

Hi,

Recently I read the IRC log:

<#ruby-lang:meep> hey what happened with the IO.select? did it sudenly
                  change behavior and now return nil instead of an
                  array of array?
<#ruby-lang:meep> not that i dont like this new behavior..
<#ruby-lang:matju> meep: it returns nil when it would return [[],[],[]]
<#ruby-lang:matju> meep: so i often write IO.select(r,w,x,t) || [[],[],[]]
                   for regularity...

When I originally implemented IO.select, I thought returning nil for
timeout was a good idea (that tells you timeout explicitly).

But now I think it's arguable.  If IO.select returned [[],[],[]] for
timeout, most routines could handle timeout well.  I'm still not sure,
so I put this as an RCR to call for discussion.

How do you think?

							matz.