Nice, I like it! ;-) This idiom (if I may call it that) is short enough that, IMHO, it doesn't even really need a sub and fits comfortably on a line with a comment explaining it:

{do eof local *%} # reset Perl's internal "last accessed" filehandle

(I had to put the do in there to get rid of a "Useless use of eof in void context"...) I find it funny that there are so many alternatives to *%, like ** and *! :-)

... but of course a sub is the more "best practice" solution here.

Update: See replies.

In reply to Re^3: Do I need/want to close __DATA__? (updated) by haukex
in thread Do I need/want to close __DATA__? by bliako

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