The critical point being "NB. Can't follow more than one selection path" on https://code.jsoftware.com/wiki/Vocabulary/curlylfcoco
R.E. Boss -----Original Message----- From: Programming <[email protected]> On Behalf Of Henry Rich Sent: zondag 19 juli 2020 16:21 To: [email protected] Subject: Re: [Jprogramming] from vs fetch Best I've got is (0;1) {::"1 0 y 2 4 6 I would use 1 {&> y Henry Rich On 7/19/2020 5:18 AM, R.E. Boss wrote: > In NUVOC https://code.jsoftware.com/wiki/Vocabulary/curlylf#dyadic I read : > "A selector of a: designates an omitted axis which is taken in full." > How is this done in > https://code.jsoftware.com/wiki/Vocabulary/curlylfcoco#dyadic ? > > MWE. > With from: > > ]y =. 1 2,3 4,:5 6 7 > 1 2 0 > 3 4 0 > 5 6 7 > > (< a:,&<1){y > 2 4 6 > > With fetch, which x and foo (using {:: ) produces > > ]y =. 1 2;3 4;5 6 7 > ┌───┬───┬─────┐ > │1 2│3 4│5 6 7│ > └───┴───┴─────┘ > x foo y > 2 4 6 > > or > x foo y > ┌─┬─┬─┐ > │2│4│6│ > └─┴─┴─┘ > > like 1{S:0 y or 1{L:0 y does. > > > R.E. Boss > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- This email has been checked for viruses by AVG. https://www.avg.com ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
