Michael Witten <mfwitten@xxxxxxxxx> writes:
>> Because "while (<>)" does not localize $_, you are clobbering it in the
>> caller's context. I do not know if any of the the existing callers cares,
>> but it is a change in behaviour.
>
> How about:
>
> while (local $_ = <$fh>)
>
> Or, in our case, this:
>
> while (my $_ = <$fh>)
Special variables like $_ cannot be made into lexicals, unless you know
you will only run with a very recent version of Perl (5.9.1, I think).
If you do not want to worry about portability, typically it is easiest to
say "local ($_)" upfront in the beginning of a sub.
I do not understand why you want to change the original
while (my $line = <$fh>) {
...
}
though.
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