Documentation is in the works. Z: can be called from v if you like.
_1&Z: makes sense if the computation that follows it is costly. Henry Rich On 8/27/2019 10:42 PM, 'Pascal Jasmin' via Beta wrote:
documentation needs a lot of attention. https://code.jsoftware.com/wiki/System/Interpreter/Requests#Fold_.28strawman.29 I think all references for Z: should refer to u verb? Would Z: ever be called in v verb? _1&Z: makes no sense. As a simple example, find first prime whose next prime is greater than 5 higher? [`(_2 Z: 1:)@.(5 < -) F.. ] p: i.20 23 [`(_2 Z: 1:)@.(5 < -) F:. ] p: i.20 NB. multiple version that builds list and stops on condition. 3 5 7 11 13 17 19 23 How might you get the first prime whose previous neighbour is less than 5 higher? (29) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
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