On Thu, Sep 01, 2016 at 07:45:45PM +0800, Ben Coman wrote: > I don't know the answer but I assume you a looking for a memory > efficient way of storing booleans. So perhaps the Bit Field layouts > discussed here [1] may be of interest considering the recent > introduction of Slots to Pharo. Otherwise I verry vaguely remember > Bitmap used for this somewhere. Sorry I can't be more precise.
Form uses Bitmap to represent graphical stuff. Bitmap itself is a subclass of ArrayedCollection. Peter
