Good one! (I haven't tested, but I expect you could say <^:3"0 in place of <@<@<"0 )
> On Mar 27, 2014, at 4:26 PM, Thomas Costigliola <[email protected]> wrote: > > (*/@{/~<@<@<"0@i.@#) 4 3 2 8 > 48 64 96 24 > > > >> On Thu, Mar 27, 2014 at 4:10 PM, Dan Bron <[email protected]> wrote: >> >> Oh, I like this game! >> >> (*/ % ]) 4 3 2 8 >> 48 64 96 24 >> >> (*/@#~1-=@i.) 4 3 2 8 >> 48 64 96 24 >> >> -Dan >> >> ----- Original Message --------------- >> >> Subject: Re: [Jprogramming] J as an interviewing tool >> From: Roger Hui <[email protected]> >> Date: Thu, 27 Mar 2014 12:44:59 -0700 >> To: Programming forum <[email protected]> >> >> Suppose you did not have the outfix operator, but still have array ops. >> >> x=: 4 3 2 8 >> I=: =i.#x >> I >> 1 0 0 0 >> 0 1 0 0 >> 0 0 1 0 >> 0 0 0 1 >> (-.I)*/ .(^~) x >> 48 64 96 24 >> >> >> >> >> ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
