I read about installing a __WARN__ signal handler, but that appears to require exposing $arrayRef to a wider scope.
No. Did you try? The trick is to install a local $SIG{__WARN__}:
sub compareLT105
{
my $arrayRef = shift;
{ # bare block to narrow scope of local()
local $SIG{__WARN__} = sub {
chomp( my $msg = $_[0] );
print STDERR $msg," \$arrayRef = [qw(@{$arrayRef})]\n";
};
return 'true' if $arrayRef->[1] < 105;
}
return 'false';
}
For 100 compareLT105 says: true
For 106 compareLT105 says: false
Argument "100A" isn't numeric in numeric lt (<) at warn.pl line 27. $a
+rrayRef = [qw(3 100A)]
For 100A compareLT105 says: true
Argument "100B2" isn't numeric in numeric lt (<) at warn.pl line 27. $
+arrayRef = [qw(4 100B2)]
For 100B2 compareLT105 says: true
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