[Cuis-dev] A few missing things & porting stuff to Cuis

[Luciano Notarfrancesco]

Hi, I think if you need to port ScaledDecimal for your project it would be
nice to put it in a separated ScaledDecimal package, so anyone who needs it
can use the package. We do this with Complex for example.

About random generators, I use the default one (ParkMiller93Random), have
been using it extensively for years and never had the need to use a
different one. But again it is great to have alternatives, and could be
useful to have this in a package too. In Cuis the random number generators
are extensible, so it is easy to create a new subclass of Random that
implements a different algorithm. The disadvantage I see with the algorithm
you propose is that it uses 64 bit arithmetic and would end up using
LargeIntegers in 32 bit platforms, right? About gaps, in Cuis we
implemented the random number generators as sort of black boxes that output
a number of uniformly distributed bits each time, and we can concatenate
them to generate random bitstrings of any size, so there are no gaps when
generating Floats or arbitrarily large integers (see Random>>nextInteger:).
Of course there could be loss of random qualities if you use it to generate
too big bitstrings, but the period is large enough and it never was a
problem for me.


On Wed, 31 Mar 2021 at 4:26 PM Benoit St-Jean via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

> Is there any reason why ScaledDecimal is not present in Cuis? Would
> anyone be interested if I did port it to Cuis?
>
> I was thinking about porting the MySQL driver to Cuis (hence the need
> for ScaledDecimal) as a nice project to experiment with Cuis.  Anyone
> interested by such a port?
>
> I noticed you have a few random number generators in Cuis.  Would anyone
> like me to port my version of SplitMix64
> (https://github.com/bstjean/SmalltalkStuff/tree/master/SplitMix64) to
> Cuis ? It's a RNG used to generate very large numbers that doesn't
> suffer the usual gaps created with 32 bit arithmetic.
>
> P.S. Very nice job guys!
>
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