Hello I have been reading Martin Neitzel's paper on verb ranks from APL Quote Quad '95. That helped me deepen my understanding on the subject, though I don't feel completely secure with my understanding yet.
On section 10 Excercises for Rank, there is a problem answered at the end: [quote] The reshape verb $ has dyadic ranks (1 _). It is no problem to evaluate 3 2 4 $ 'abc', but try to find some invalid rank specification n in 3 2 4 $"n 'abc'! [/quote] I couldn't come up with such n that throws an error. Any ideas? June ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
