counting matching bits / bitXnor

Yoshiki Ohshima yoshiki at vpri.org
Mon Dec 17 18:44:27 UTC 2007


> Use a Bitmap and BitBLT. Dan put loads of stuff in there to mangle bits

  Yes.  There is a SqueakMap entry called BitArray that utilizes
Bitmap and BitBlt, and among others, #cardinality returns the number
of set bits.

  I haven't quite understood Cees' requirement, (is it effectively to
find a substring or not?) but BitArray might help.

-- Yoshiki



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