I am finding a "length error" in the `kmoves` monad at the following link.
https://code.jsoftware.com/wiki/Essays/Knight%27s_Tour Below is an excerpt of my jconsole session. The error is NOT created if I split the failing code expression up as you can see at the very bottom. kmoves=: 3 : 0 t=. (>,{;~i.y) +"1/ _2]\2 1 2 _1 1 2 1 _2 _1 2 _1 _2 _2 1 _2 _1 (*./"1 t e. i.y) <@#"1 y#.t ) kmoves 8 |length error: kmoves | (*./"1 t e.i.y) <@#"1 y#.t load'debug' dbss'kmoves 1' dbr 1 kmoves 8 |stop: kmoves | (*./"1 t e.i.y)<@#"1 y#.t |kmoves[1] (*./"1 t e.i.y);&$ y#.t ┌────┬────┐ │64 8│64 8│ └────┴────┘ datatype (*./"1 t e.i.y) boolean datatype y#.t integer l=.(*./"1 t e.i.y)[r=. y#.t $l <@#"1 r NB. no error here, though 64 JVERSION Engine: j903/j64/darwin Release-b: commercial/2022-01-28T04:11:24 Library: 9.03.08 Platform: Darwin 64 Installer: J903 install InstallPath: /users/brian/j903 Contact: www.jsoftware.com -- (B=) <-----my sig Brian Schott ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
