in reply to Seek, whence 0 or 1

It depends on how effective your code is to calculate either the next absolute position (0) or the offset (1). If , for instance, I have a file with sequential indices containing offsets, I'd use 1. If they are absolute file positions, then 0. Replacing with each other seek method doesn't make sense. 
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");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

In Section Seekers of Perl Wisdom