Consider:
use warnings;
use strict;
my @lines;
test ("No switch param:");
test ("Switch param is 0", 0);
test ("Switch param is -1", -1);
sub test {
my $param1 = shift;
my $switch = shift || 1;
print $param1;
print " - Switch = $switch\n";
}
Prints:
No switch param: - Switch = 1
Switch param is 0 - Switch = 1
Switch param is -1 - Switch = -1
Note that 0 || 1 is 1.
DWIM is Perl's answer to Gödel
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