[32936] in Perl-Users-Digest
Perl-Users Digest, Issue: 4212 Volume: 11
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Wed May 14 10:28:13 2014
Date: Wed, 14 May 2014 06:09:02 -0700 (PDT)
From: Perl-Users Digest <Perl-Users-Request@ruby.OCE.ORST.EDU>
To: Perl-Users@ruby.OCE.ORST.EDU (Perl-Users Digest)
Perl-Users Digest Wed, 14 May 2014 Volume: 11 Number: 4212
Today's topics:
Re: Help with an operator precedence (?) puzzle <news@lawshouse.org>
Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)
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Date: Tue, 13 May 2014 22:42:51 +0100
From: Henry Law <news@lawshouse.org>
Subject: Re: Help with an operator precedence (?) puzzle
Message-Id: <XqidnQRJUsNBDO_OnZ2dnUVZ8rydnZ2d@giganews.com>
On 13/05/14 17:40, Tim McDaniel wrote:
> In article <fcGdnfxQhMr3Q-zOnZ2dnUVZ8tidnZ2d@giganews.com>,
> Henry Law <news@lawshouse.org> wrote:
>> Well, that's what I'm trying to do. But if I have a sub which has
>> multiple different ways of going wrong, how is the caller to find out
>> what the problem was?
> (0) Your sub can die on error.
> But it's a pain if the caller usually wants to continue.
Yes; various XML modules that I use do that and it is indeed a bit of a
pain. But it's fail-safe, as you say.
>
> (2) At my $ORKPLACE, the convention in any sort of complicated
> situation is to return an anonymous hash for separate parts.
>
> { THE_VALUE_WE_WANT_TO_RETURN_NORMALLY => 23, ERROR => '' }
>
> { THE_VALUE_WE_WANT_TO_RETURN_NORMALLY => undef, ERROR => "Tuesday!" }
>
That's interesting. This particular application has a "control hash"
which is built up initially from an control file and which I then ship
around (as a hashref) between modules and subroutines, thus avoiding
lots of global variables, or lots of parameters to every call. I could
institute my own standard "last error description" within that.
Thank you for all the help, as ever. 10-7
--
Henry Law Manchester, England
------------------------------
Date: 6 Apr 2001 21:33:47 GMT (Last modified)
From: Perl-Users-Request@ruby.oce.orst.edu (Perl-Users-Digest Admin)
Subject: Digest Administrivia (Last modified: 6 Apr 01)
Message-Id: <null>
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End of Perl-Users Digest V11 Issue 4212
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