>
> I ported a Clojure implementation of Conway's Game of Life to Factor.
> Here is the original Clojure version:
> http://clj-me.cgrand.net/2011/08/19/conways-game-of-life/
> Here is my Factor port: http://paste.factorcode.org/paste?id=2932
> How can I make the Factor variant more elegant and/or idiomatic?
>
Some ideas:
1) Your "frequencies" word is the same as "histogram" in math.statistics
vocabulary.
2) Your calculation of neighboring cells could use a constant to represent
the 8 adjacent cells, instead of computing it each time:
CONSTANT: coordinates {
{ 1 1 }
{ 1 0 }
{ 1 -1 }
{ 0 1 }
{ 0 -1 }
{ -1 1 }
{ -1 0 }
{ -1 -1 }
}
: neighbours ( loc -- neighbours )
coordinates [ v+ ] with map ;
3) you might try factoring out the steps in "steps", perhaps something like
this:
: count-cells ( cells -- counts )
[ neighbours ] map concat histogram ;
:: live? ( loc count cells -- ? )
count 3 = [ t ] [ count 2 = loc cells in? ] if ;
:: steps ( cells -- cells' )
cells count-cells [ cells live? ] assoc-filter keys ;
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