I think you missed the problem. The definition why expects both a left and a right argument. The original post shows no definition for x . So erase any definition of x that might be floating around.
why=: 13 :'x + 10*y'/|. 1 2 3 4 5 erase names 'x' 1 why 12345 The result has been produced without a value for x : x |value error: x There is only one noun that the verb is supplied with in a dyadic definition. How can it have a result? Linda -----Original Message----- From: programming-boun...@jsoftware.com [mailto:programming-boun...@jsoftware.com] On Behalf Of Raul Miller Sent: Monday, January 02, 2012 11:28 AM To: Programming forum Subject: Re: [Jprogramming] Binary representation without #: or #. Every explicit verb has an implicit first line: y=. right argument. Every dyadic explicit verb has an implicit second line: x=. left argument Here, right argument and left argument are meant to represent the nouns which the verb is supposed to deal with. The explicitly provided lines would follow the above implicit lines. -- Raul On Mon, Jan 2, 2012 at 11:18 AM, Linda Alvord <lindaalv...@verizon.net> wrote: > Now I have a new problem: > > why=: 13 :'x + 10*y'/|. 1 2 3 4 5 > erase names 'x' > 1 > why > 12345 > x > |value error: x > > What is x in why ? > > -----Original Message----- > From: programming-boun...@jsoftware.com > [mailto:programming-boun...@jsoftware.com] On Behalf Of Aai > Sent: Monday, January 02, 2012 5:42 AM > To: Programming forum > Subject: Re: [Jprogramming] Binary representation without #: or #. > > > > On 02-01-12 11:21, Linda Alvord wrote: >> This was a while ago, but how about a simple J version: >> >> brila=: 13 :'([:(++:)/|.)"1 y' >> brila >> ([: (+ +:)/ |.)"1 >> n=:5 3$ 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 >> n >> 0 0 0 >> 0 0 1 >> 0 1 0 >> 0 1 1 >> 1 0 0 >> brila n >> 0 1 2 3 4 >> >> I'm still puzzled by how it works: > #. 1 0 1 0 1 0 1 > 85 > > 13 :'x + 2*y'/ |. 1 0 1 0 1 0 1 > 85 > > or > > 13 :'x + +: y'/ |. 1 0 1 0 1 0 1 > 85 > > > Simple J(?) > > 13 :'x + +: y' > [ + [: +: ] > > or concise: > > (++:) > > Base 10 example: > > 13 :'x + 10*y'/ |. 1 2 3 4 5 > 12345 > > (+10&*)/ |. 1 2 3 4 5 > 12345 > > > -- > Met vriendelijke groet, > @@i = Arie Groeneveld > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
