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.

[1] 
http://rmod.inria.fr/archives/papers/Verw11a-OOSPLA11-FlexibleObjectLayouts.pdf

cheers -ben

On Thu, Sep 1, 2016 at 1:32 AM, Bernardo Ezequiel Contreras
<[email protected]> wrote:
> Hi,
>   why there isn't a BitArray or BooleanArray in the collection library?
>   is there a sustitute for that?
>
> thanks
>
> --
> Bernardo E.C.
>
> Sent from a cheap desktop computer in South America.

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