applying the definition of @ to the expression without the / might make it clearer for a beginner to see what is happening. i=:(4 : '*:x+y')/ or i=:(13 : '*:x+y')/
Rephrased from the dictionary: Apply the dyad, "Square the sum of the left and right arguments", between the items. On Sun, Feb 5, 2012 at 8:57 AM, Dan Bron <j...@bron.us> wrote: > Linda, Boyko's not the first to express this sentiment to you. Don't you > wonder what the mysterious appeal of @ is? If so, maybe a more rewarding > (and commensurately challenging) exercise for you this morning is: > > translate from expressions without @ to ones with it > > For example, you asked for a @-free translation of *:@+/ , and RE provided > one. What he didn't tell you is that *:@+/ is probably not what you're > looking for in the first place. Translating "square of the sum" into > @-free J, we have ([: *: +/). Now, can you (Linda, personally) find an > equivalent verb, formulated using @ ? > > Good luck, > > -Dan > > PS: Even harder challenge. So hard that I'll open it up to everyone. > Express the original *:@+/ in English. > > > > > -----Original Message----- > From: programming-boun...@jsoftware.com [mailto: > programming-boun...@jsoftware.com] On Behalf Of Boyko Bantchev > Sent: Sunday, February 05, 2012 9:17 AM > To: Programming forum > Subject: Re: [Jprogramming] Another early morning exercise > > On 5 February 2012 14:11, Linda Alvord <lindaalv...@verizon.net> wrote: > > My goal has been to translate from expressions with �@ �to ones without > it. > > You also mentioned eliminating @ in another thread. > Why do you consider it important? > @ is the composition of functions � and is composition not the most > natural operation on functions that one could think of? > ---------------------------------------------------------------------- > 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
