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0 pointsRodgerTheGreat10y ago0 comments

Even by modern standards that's a pretty hefty chunk of RAM for n=8.

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4 comments · 2 top-level

jxy10y ago· 2 in thread

The problem is that the complexity is O(n²n!)

eggy10y ago

I am not a J guru, but that is just the concise implementation. There are others in the references previously cited. J is an interpreted language, and when doing db stuff, it memory maps files for speed. I know this is not the same, but I will now look into it, since I haven't done any J tracing unless a program blows up.

I also use Dyalog APL,and I don't have a special keyboard. The symbols are MORE like mathematical symbols to me. It's just that it is easier to share code in J's plain ASCII text. Some systems still don't show APL characters correctly, or the user doesn't know how just yet. I was also trying to study K and Kona, so J was the better fit.

jxy10y ago

Is it possible to programmatically transliterate APL code to J? It would be great in either interactive or scripting to try out the J interpreter, so my code

    1+2-3×4÷5

could be converted to

    1+2-3*4%5

automatically. I guess only Dyalog APL supports function trains, and J has more modern features. It would be interesting to use J as a backend. I really wish GNU APL could support function trains soon.

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agumonkey10y ago

Still smaller that an 2016 app favicon.

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