At the risk of exposing my ignorance, how would I test this? I assume
there's an analog to the Clojure example, but it's exact nature escapes me!
Any help appreciated.
-John
On Sun, May 12, 2013 at 1:00 PM, John Benediktsson <mrj...@gmail.com> wrote:
> 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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