On Sat, May 21, 2022 at 9:55 AM Robert Cyr <robert....@gmail.com> wrote: > I would add that special code is accepted as well: > locs =: cocreate &'' i.8 > The first line will work for any verb, the second is specific to cocreate > and, as far as I can tell, not documented.
It could be better documented, but this actually is documented. The above expression is equivalent to: locs=: (i.8) cocreate '' And, cocreate has a left rank of zero: cocreate b.0 _ 0 _ And, we even have documentation on what the (optional) x argument to cocreate is, if you know where to look for it: cocreate 18!:3 https://www.jsoftware.com/help/dictionary/dx018.htm#3 "x specifies the size of the hash table for the locale, requiring w*2^6+x bytes where w is the number of bytes in a word. If x is elided, then the defaults specified in 9!:38 and 9!:39 are used. A larger hash table size improves performance; regardless of the hash table size, a locale may contain an effectively unlimited number of names." There's even a little guidance on the performance curve at the documentation for 9!:38 -- https://www.jsoftware.com/help/dictionary/dx009.htm#38 -- but that's long enough that I won't bother to quote it here. That said, constructing benchmarks to measure locale namespace performance would be .. interesting. Mostly, I imagine that we don't use a lot of names, but sometimes we do. And, locale size might also have performance implications in contexts where we have a lot of locales. Anyways... I did not know (or forgot) about this mechanism and did not think to look it up until you mentioned it. Thanks, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
