for completeness and future memory.. as this is a non-problem better would be to not-resolve it. instead rethink it and achieve in another way: a sub returnig a composed string.
#!perl
use strict;
use warnings;
$|++;
my $first;
my @sec;
print &compose, "\n";
$first = 'UNO';
print &compose,"\n";
push @sec, '1','2';
print &compose,"\n";
$sec[5] = 'sixt';
print &compose,"\n";
undef $first ; @sec = ();
print &compose,"\n";
sub compose {
my $it = 'First is '.
($first ? $first : 'not yet defined ').
' and the list is '.
(@sec ? '('.(join ' ',map {$_||'UNDEFINED'}@sec ).')': ' e
+mpty');
return $it;
}
__OUTPUT__
First is not yet defined and the list is empty
First is UNO and the list is empty
First is UNO and the list is (1 2)
First is UNO and the list is (1 2 UNDEFINED UNDEFINED UNDEFINED sixt)
First is not yet defined and the list is empty
L*
there are no rules, there are no thumbs..
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.