From: utzoo!decvax!cwruecmp!honton Newsgroups: net.lang.apl Title: followup on apl quiz Article-I.D.: cwruecmp.114 Posted: Thu Jun 24 13:17:44 1982 Received: Mon Jun 28 01:05:38 1982 I recieved quite a few answers to my apl quiz. Here are some of the answers. The overwhelming reply was something of the form: (iota 0) rho vector (I was quite pleased to see that the null vector was produced in a variety of ways; (iota 0), '' ,(0 rho 0). The generalization of the previous answer is: ((1 ne rho vector)/ rho vector) rho vector Of course, as some of you pointed out, the structure of the result can be radically different. Other ways for the specialized case were: vector[1] 1 take vector Thanks one and all who answered. chas (decvax!cwruecmp!honton)