Here is a verb whose domain is single numbers and whose result is the simplest array which contains that number:
number =: {.@,@:+&($: ::]@,: 0x) number 1 1 1$ 0 0 $number 1 1 1$ 0 number 1 2 |length error: number number 'a' |domain error: number -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm