G'day alexander_lunev,

A lesson well learned — thanks for posting.

"But why would anyone write about it again, and again, and again?"

I wouldn't be concerned with that. I've certainly urged people to use local in many posts; and not just for $/ but for other special variables which can have a global effect.

I actually take this a step further and use an anonymous block along the lines of 

{
    open my $fh, ...
    local $/;
    # do whatever with $fh here
}

[download]

From the local documentation:

"A local modifies the listed variables to be local to the enclosing block, ..."

And from "perlvar: Variables related to filehandles":

"Usually when a variable is localized you want to make sure that this change affects the shortest scope possible."

Also note that the "= undef" is unnecessary; and the "close $fh" is implicit at the end of the anonymous block (see open for details). I'm not saying don't use them: just advising that they're optional (at least in the type of code you show in your example).

— Ken

In reply to Re: Beware of global! And bless the local! by kcott
in thread Beware of global! And bless the local! by alexander_lunev

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