I seem to be forgetting basic symbolic reference usage.
I don't understand why the following attempt at using a symbolic reference for an array name doesn't produce correct output. I'm trying to pass array names of interest to a subroutine that prints the subname and it's length. Seems simple enough. But no luck...
#!/usr/bin/perl -w
use strict;
my ($Devel, $Debuff_Output) = (1,1);
if ($Debuff_Output) { select STDERR; $| = 1; select STDOUT; $| = 1; }
if ($Devel) { use Carp qw(cluck confess);
$SIG{__WARN__} = $SIG{__DIE__} = sub {confess @_} }
my @array = (1, 2, 3, 4);
my @array2 = (3, 5, 7);
sub arlen ($) {
my $ar_nam=$_[0];
no strict 'refs';
my $ar_len = eval $#$ar_nam;
sprintf "name=%s, length=%d", $ar_nam, $ar_len;
}
foreach ('array', 'array2') {
no strict 'refs';
printf "Array %s\n", arlen $_;
}
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