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Subject Author Date
finding version number of a library Nick Wedd 08-10-2007
Posted by comp.llang.perl.moderated on August 16, 2007, 12:57 pm
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> On Aug 15, 9:09 pm, "comp.llang.perl.moderated" <c...@blv-
>
> sam-01.ca.boeing.com> wrote:
> > one other option is to request a humongously
> > version number (perldoc -f use) :
>
> > $ perl -e "use GD 9999"
> > GD version 9999 required--this is only version 2.35 at -e line 1.
>
> Just don't try this for File::Slurp, which is at version 9999.12! (I
> don't know if there are any other CPAN modules with falsely inflated
> version numbers above 9999?)

No, if there's no error message, then you know
it's a "Slurp-y" style so you just bump the
version a couple more 9's.

Even with a rare, add-on edit, this's
easier than $MODULE_NAME::VERSION...

--
Charles DeRykus



Posted by Michael Carman on August 16, 2007, 8:18 pm
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On 8/10/2007 5:54 AM, Nick Wedd wrote:
>
> When my code says
> use GD;
> it works. My guess is that my web host has installed a copy of the GD
> module. How can I find its version number?

Standard Perl practice is to define a $VERSION variable for each module
(although nothing forces authors to do so). So C<$GD::VERSION> should hold the
version.

Normally the only reason you care about this is if your code depends on a
certain (minimum) version, in which case you should specify it in the 'use'
statement. e.g.

use GD 2.10;

-mjc

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