But are these ranks? This the same result that I get with the original expression you used?
Linda -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kip Murray Sent: Tuesday, November 22, 2011 11:28 PM To: Programming forum Subject: Re: [Jprogramming] 21 November ranks challenge in Simple J NB. Explain behavior of r =: [: |. 3 $ |. NB. Compare steps for r 0 1 with steps for r i. 2 3 4 . NB. First r 0 1 1 0 1 NB. What happens is |. 0 1 NB. Reverse 0 1 1 0 3 $ 1 0 NB. Select from 1 0 1 0 1 0 ... until 3 have been chosen 1 0 1 |: 1 0 1 NB. Reverse 1 0 1 1 0 1 NB. Now look at i. 2 3 4 NB. Items are two 3 by 4 arrays, think array0 and array1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 NB. When we do r i. 2 3 4 what happens is |. i. 2 3 4 NB. Reverse the two arrays 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5 6 7 8 9 10 11 3 $ |. i. 2 3 4 NB. Select 3 from array1 array 0 array 1 array 0 ... 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |. 3 $ |. i. 2 3 4 NB. reverse the selected arrays 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 NB. Thus, r i. 2 3 4 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 On 11/22/2011 8:54 PM, Linda Alvord wrote: > Here's a simple translation, but both it and the original have the same > peculiarities. > > ranks =: 3 : '3$&.|.y' > ranks > 3 : '3$&.|.y' > > ranks2 =: 13 : '3$&.|.y' > ranks2 > 3 $&.|. ] > > r=: 13 :'|.(|. 3) $|.y' > r > [: |. 3 $ |. > > 5!:4<'ranks' > -- 3 > - : -+- ,:'3$&.|.y' > > 5!:4<'ranks2' > -- 3 > │ -- $ > --+-&. -+- |. > L- ] > > 5!:4<'r' > -- [: > +- |. > --+ -- 3 > L----+- $ > L- |. > > ranks 2 > 2 2 2 > ranks 2 3 > 3 2 3 > ranks i.2 3 4 > 12 13 14 15 > 16 17 18 19 > 20 21 22 23 > > 0 1 2 3 > 4 5 6 7 > 8 9 10 11 > > 12 13 14 15 > 16 17 18 19 > 20 21 22 23 > > > > r 2 > 2 2 2 > r 2 3 > 3 2 3 > r i.2 3 4 > 12 13 14 15 > 16 17 18 19 > 20 21 22 23 > > 0 1 2 3 > 4 5 6 7 > 8 9 10 11 > > 12 13 14 15 > 16 17 18 19 > 20 21 22 23 > > I have't followed some of the later ways to find rank. My question is what > happened here. It seemed like a simple J expression. > > Thanks > > Linda > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Kip Murray > Sent: Monday, November 21, 2011 6:40 AM > To: Programming forum > Subject: Re: [Jprogramming] 21 November ranks challenge in Simple J > > It is 21 November, solutions are welcome. > > On 11/18/2011 11:33 AM, Kip Murray wrote: >> Please wait until Monday 21 November to post solutions. >> >> From the Rank u"n page in the Vocabulary: >> >> The verb u"n applies u to each cell as specified by the rank n . The >> full form of the rank used is 3$&.|.n . For example, if n=:2 , the three >> ranks are 2 2 2 , and if n=: 2 3, they are 3 2 3 . >> >> The challenge: rewrite verb >> >> ranks =: 3 : '3$&.|.y' >> >> using a train with no conjunctions. >> >> ranks 2 >> 2 2 2 >> ranks 2 3 >> 3 2 3 >> >> ---------------------------------------------------------------------- >> 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
