I was referring to being wary
is used on its own. To illustrate:
$ perl -e 'print "with_ending\nno_ending"' > a.txt
$ perl -MData::Dumper
open(FH, "<", "a.txt") or die $!;
my $line1 = <FH>;
my $line2 = <FH>;
my $line3 = <FH>;
$Data::Dumper::Useqq = 1;
print Dumper [$line1, $line2, $line3];
$VAR1 = [
We see that there is a possibility that a line read ($line3
in this case) may return undef
. That's what I meant: we need to be wary that a line read will not always return defined.
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