hakank · HackerTrans

2 tahun yang laludiscuss

Yes, the underlying engine of Picat is - a slightly altered- B-Prolog, which is available as the "bp" module, from which one can use many of traditional Prolog constructs, for example `bp.length/2` instead of Picat's `length/1` function. This can help when porting Prolog programs to Picat. In fact, quite a few Prolog programs can be run directly in Picat, perhaps with just some few adjustment.

For some example of the available predicates in the bp module, see my http://hakank.org/picat/v3_utils.pi . Also, see http://hakank.org/picat/#v3 for some examples of ported Prolog programs.

hakank

3 tahun yang laludiscuss

I really like MiniZinc, especially that one can test a lot of different type of solvers for a problem.

But one of its drawbacks is its limitation of handling input and output (including preprocessing and postprocessing). In some cases - for example when the output is rather simple - I use for example Picat/Python to transform input to MiniZinc format (.dzn format or JSON) and then run MiniZinc.

But for more fancy output I tend to use Picat or Python + (OR-tools CP/SAT or CPMpy or minizinc-python).

That being said, one can do fancier output in MiniZinc, though it requires some work. Here is a model for certain scheduling problems which exemplifies this: http://hakank.org/minizinc/scheduling_with_assignments.mzn . But the output was a little easier to do in Picat: http://hakank.org/picat/scheduling_with_assignments.pi

hakank

3 tahun yang laludiscuss

Thanks for your kind words.

hakank

3 tahun yang laludiscuss

> You around, Hakan? :-)

Of course! :-)

hakank

3 tahun yang laludiscuss

Here are some implementations in different constraint languages on this puzzle (which I call the "Einav puzzle"): http://www.hakank.org/common_cp_models/#einavpuzzle

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