If you're undef'ing it, then you're in slurp mode, and there's no point in looping, because there's only going to be one line in the file ...
sub slurpie {
local $/ ;
return <DATA>; # contains whole thing
}
sub DATA_w_line_numbers {
while (<DATA>) {
print "$.) $_";
}
}
Also be sure to read through all off the perlvar section on $/ -- i think you're looking for local $/ = "";
This may be of interest as well: Perl Idioms Explained - my $string = do { local $/; <FILEHANDLE> };
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