From: "Berger, Daniel" <Daniel.Berger@...>
Date: 2005-05-13T05:54:23+09:00
Subject: Re: [ ruby-Patches-1900 ] Pointless argc check in Array#select

> -----Original Message-----
> From: dblack@wobblini [mailto:dblack@wobblini] On Behalf Of 
> David A. Black
> Sent: Thursday, May 12, 2005 1:55 PM
> To: ruby-core@ruby-lang.org
> Subject: Re: [ ruby-Patches-1900 ] Pointless argc check in 
> Array#select
> 
> 
> On Fri, 13 May 2005, David A. Black wrote:
> 
> > Hi --
> >
> > On Fri, 13 May 2005, Daniel Berger wrote:
> >> 
> >> Ah, here's the issue.
> >> 
> >> # test.rb
> >> a = [1,2,3]
> >> a.select # LocalJumpError
> >> 
> >> [].select # no error
> >> 
> >> I'd call that a bug.  I guess I better get crackin' with that test 
> >> suite,
> >> eh?
> >
> > Just to throw in the counter-argument:
> >
> > Since the block would never be executed with an empty array anyway, 
> > why enforce its presence?
> 
> Or, to put it more precisely:
> 
> It's 'yield' that raises the exception.  In this case:
> 
>    [].select
> 
> yield is never called.  So expecting an exception would be 
> sort of like expecting a ZeroDivisionError here:
> 
>     def z
>       return
>       puts 1/0
>     end
>     z
> 
> I now officially think that it is not a bug :-)

Ok, I can accept that. :)

Dan