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Re: reference , advantages?

by Sandy (Deacon)
on Jun 30, 2011 at 18:10 UTC ( #912226=note: print w/ replies, xml ) Need Help??


in reply to reference , advantages?

Sometimes it is advantageous to use code-refs.

#!/usr/bin/perl use strict; use warnings; my $dref = \&new_date; my $fref = \&new_date_append; # call function foo, print different types of date foo ($dref); foo ($fref); sub new_date { my ( $year, $month, $day ) = (localtime)[ 5, 4, 3 ]; sprintf( "%04d%02d%02d", ( $year += 1900 ), $month + 1, $day ); } sub new_date_append { my $date = new_date(); return "OhioS___$date"; } sub foo { my $date_fn = shift; print $date_fn->(),"\n"; }
Note

$dref=\&new_date is a reference to SUBROUTINE, $dref=\&new_date() is reference to the SCALAR returned by the subroutine


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Reaped: Re^2: reference , advantages?
by NodeReaper (Curate) on Jun 30, 2011 at 19:52 UTC

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