Hello TonyNY,

You should always code with

use strict;
use warnings;

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at the head of your script, in which case, if $ARGV[2] is undefined, the statement chomp $id; will generate a warning. So the correct logic is:

use strict;
use warnings;

my ($pkgname, $envname, $id) = @ARGV;

if (defined $id)
{
    chomp $id;
    print "Third argument: >$id<\n";
}
else
{
    print "No third argument\n";
}

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BTW, these statements:

chomp;
s/^\s+|\s+$//g; # trim spaces

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operate on the default variable $_, which is not initialised in the code snippet you show.

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re: Make command line argument optional by Athanasius
in thread Make command line argument optional by TonyNY

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