Infix is good if you have dyadic functions/operators. For example: * +x y - x y (x+y)*(x-y)
On Fri, Oct 28, 2011 at 12:50 PM, Andrew Pennebaker <[email protected]> wrote: > Thanks Björn, Roger, and Lettow. > > The docs imply that J and its predecessor APL use prefix/right-to-left > syntax. So I expected all J code to have the form: > > operator operands > > And therefore defining functions to be similar to stack languages, but in > reverse order. > > myfunc =: operator constant_operands & > > Or like Haskell function composition, because a fully right-to-left order of > operations makes composition intuitive. > > myfunc =: operator constant_operands > > I wish J didn't use infix operators as they create confusion in a > predominately prefix language. > > Cheers, > > Andrew Pennebaker > www.yellosoft.us > > On Fri, Oct 28, 2011 at 2:04 PM, Lettow, Kenneth <[email protected]>wrote: > >> You should post this in jprogramming. >> >> In any case, it looks like you just juxtaposed a few characters. >> >> mod3=: 3&| >> mod3 i.10 >> 0 1 2 0 1 2 0 1 2 0 >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Andrew Pennebaker >> Sent: Friday, October 28, 2011 1:54 PM >> To: J >> Subject: [Jbeta] syntax for functions and modulo >> >> I'm trying to make a function mod3 that returns the input modulo three, >> but >> my syntax is wrong. I don't see why the syntax would be any different >> from >> the double example in the docs. >> >> $ jconsole >> double =: * & 2 >> double 1 >> 2 >> double 2 >> 4 >> double 3 >> 6 >> mod3 =: 3 | & >> |syntax error >> | mod3=: 3|& >> >> >> Cheers, >> >> Andrew Pennebaker >> www.yellosoft.us >> ---------------------------------------------------------------------- >> 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
