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From: marcus@eecs.cs.pdx.edu (M. Daniels)
Newsgroups: comp.lang.perl
Subject: vec problems
Summary: using large vectors, can't extract bits of any size but 1
Message-ID: <10@pdxgate.UUCP>
Date: 30 Aug 90 07:34:18 GMT
Sender: news@pdxgate.UUCP
Distribution: comp
Lines: 20


I am using a large vector (from 860-1200 bits) as a key to an
associative array (its a simple way to find unique records).  Anyway,
what I want to do is take the length of the vector and find the first
active bit (so larger vectors of the same value can be compared).
If I do a for loop down from 8*length($vec) to 0, stopping when
vec($vec,$x,1)!=0 everything works great, but it seems
like it would be better to go by 8s.  However, when I do this, vec
only returns zeros.  huh?  I'm sure this is really obvious.  The docs
say BITS must be a power of 2 from 1 to 32, but 8 is.

thoughts, anecdotes, anything?

thanks

marcus daniels
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