In your ((Y+X)*2) the grammar of your argument to xy matches the grammar of this sentence:
((+++)+2) Since this has a noun on the right, J will try to evaluate the expression before passing it to xy. And if I recall correctly, X is defined to give a domain error when used without a right argument. So that is where your domain error comes from. You might try changing 2 to 2: or 2"_ (either 2: or 2"_ will address the grammatical issue which caused execution to not be deferred). Thanks, -- Raul On Thu, Jan 9, 2014 at 12:13 PM, Joe Bogner <joebog...@gmail.com> wrote: > Neat, it looks like it would be helpful for beginners to tacit. I may > have found a bug though or some unexpected behavior to me at least. > > addMultiply2=: ((Y + X)*2) xy > |syntax error: X > > These work > > add=: (Y + X) xy > 2 add 3 > > 5 > > addMultiply=: ((Y + X)*X) xy > 2 addMultiply 3 > > 10 > > > > > On Wed, Jan 8, 2014 at 10:14 PM, Raul Miller <rauldmil...@gmail.com> wrote: >> Michal posted that definition at >> https://github.com/tangentstorm/tangentlabs/blob/master/j/tacitxy.ijs >> as he noted in his message. >> >> FYI, >> >> -- >> Raul >> >> On Wed, Jan 8, 2014 at 10:05 PM, Linda Alvord <lindaalv...@verizon.net> >> wrote: >>> What is your defiiniton of xy ? >>> >>> f =: (Y * X + Y)xy >>> 1 2 f 3 4 >>> |value error: xy >>> >>> Linda >>> >>> -----Original] Message----- >>> From: programming-boun...@forums.jsoftware.com >>> [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Michal >>> Wallace >>> Sent: Tuesday, January 07, 2014 2:15 PM >>> To: programm...@jsoftware.com >>> Subject: [Jprogramming] blunt verbs (tacit x and y) >>> >>> Hey all, >>> >>> I made an adverb ('xy') that lets trains refer to their arguments >>> explicitly. >>> >>> Example: >>> >>> f =: (Y * X + Y)xy >>> 1 2 f 3 4 >>> 12 24 >>> >>> X and Y behave like [ and ], but reference the arguments of the whole train: >>> >>> 0 1 (2: X 3:)xy 4 5 >>> 0 1 >>> 0 1 (2: Y 3:)xy 4 5 >>> 4 5 >>> >>> I have no use for it yet, but it was fun to make. :) >>> >>> https://github.com/tangentstorm/tangentlabs/blob/master/j/tacitxy.ijs >>> ---------------------------------------------------------------------- >>> 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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
