The following simple subroutine:
sub log_msg {
my $log_msg = shift;
print "value $script::debug";
if ($script::debug) {
print sprintf "(%s) $log_msg \n", shell_date;
}
}
still prints log messages when the printed value of $script::debug is 0.
So this yields two questions, and I would like an answer to both:
What are all the false values in Perl? I know of the following:
- "0"
- ""
- 0
- 0.0
How do one brute-force print every character in a string even if it is typically unprintable? That is, my guess is that things are being printed even when $script::debug appears to be zero when in fact there may be some hidden control char or something in the string.
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