Question about ":"

vit has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,
Could you please explain me (or point me to a right place in a tutorial) what is the meaning of ":" and "()" in

my ($global):shared;
[download]

from http://www.bytemycode.com/snippets/snippet/286/

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Re: Question about ":" by moritz (Cardinal) on Jan 03, 2011 at 17:21 UTC
The `:shared` is a so-called attribute, and is describe in perlsub. This particular is probably related to threads::shared. The () is just grouping or list construction. Perl 6 - second systems done right	[reply] [d/l]
Re: Question about ":" by locked_user sundialsvc4 (Abbot) on Jan 04, 2011 at 02:33 UTC
... and the `“()”` is simply Perl’s required syntax for specifying more-than-one variable name in a `my` declaration. (Don’t ask me why.)
Re^2: Question about ":" by Anonymous Monk on Jan 04, 2011 at 02:58 UTC
Because the manual says so :) and because you can write `(my $stuff: bar, undef, $glo : bal, my $ra : men ) = @_; my ( $d, $a, $n, $d, $i, $e, $s ) : dandies = @_;` [download] it would be tedious to have to use `(my($stuff):bar...`	[reply] [d/l] [select]
Re^2: Question about ":" by DStaal (Chaplain) on Jan 04, 2011 at 15:48 UTC
Because you are specifying a list of variables, and `()` denotes a list.	[reply] [d/l]