Some people might say it is OK to use global variables for filehandles. I think the my $IN notation is confusing for noobs, and many examples in tutorials use global variables for filehandles. One thing for sure, they won't break your program (although they could potentially lead to hard-to-find bugs if you write a complex program with different libraries or subroutines.)

In reply to Re^2: How to read in and write out Unicode (UTF-8) file in Greek by Anonymous Monk
in thread How to read in and write out Unicode (UTF-8) file in Greek by plwtoday

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