R&S HUI wrote:
When an argument of a verb is _. , all bets are off.("All bets are off" is an idiom meaning: anything can happen and don't blame me if it does.)
What is the verb that test for _. which is guaranteed to work? isnull _. -> 1 isnull 1 -> 0 regards, bill ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
