WRT your first SSCCE: while does not automatically assign the result of its CONDITION evaluation to $_ (in contrast to the
while (<FILEHANDLE>) { do_something_with($_); }
special case):
c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"foreach my $filename (qw(a b c)) {
dd 'before while loop, $filename is', $filename;
while ($filename) {
dd 'in while loop, $_ is', $_;
last;
}
}
"
("before while loop, \$filename is", "a")
("in while loop, \$_ is", undef)
("before while loop, \$filename is", "b")
("in while loop, \$_ is", undef)
("before while loop, \$filename is", "c")
("in while loop, \$_ is", undef)
Give a man a fish: <%-{-{-{-<
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