I think it would be a good practice to check the return of open function and to also close an opened filehandles like
open my $fh,'<',$ARGV or die "can't open file: $!";
close $fh or die "can't close file: $!";
Except one is doinguse autodie qw(open close);
If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me
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