Off the top of my head, I don't know of a way other than 3!:0 by which to determine whether I'm working with an array of numeric, literal, or box atoms. My sense of "internal" vs "external" considerations has me thinking that this quality is "inside" what J primaries naturally involve, as opposed to implementation details that count as external (and thus call for !: )
Is there a better way for me to distinguish among the major types of atoms? If 3!:0 is the best way, is there an explanation as to why examining atomic type is considered an external task, not a primary one? Thank you, Tracy ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
