m"n already has a meaning and in that meaning ]`|."1 i.5 6 has value 5#,:(]`|.)
----- Original Message ----- From: Oleg Kobchenko <[EMAIL PROTECTED]> Date: Sunday, November 26, 2006 1:29 am Subject: Re: [Jprogramming] zig-zag order > The definition of /. has a nice feature for > gerunds: > > x m/.y applies successive verbs from the gerund > m to the collections of y, extending m cyclically as required. > > If there were such adverb that simply > applied items of the gerund to items of argument > extending it cyclically, that zigzag would be trivial. > > Suppose, such adverb is m"n, which for gerund m > applies its items to cells of rank n of the argument. > Then result would be > > ]`|."1 i.5 6 > > > > ----- Original Message ---- > From: Roger Hui <[EMAIL PROTECTED]> > To: Programming forum <[email protected]> > Sent: Sunday, November 26, 2006 3:27:41 AM > Subject: Re: [Jprogramming] zig-zag order > > > 0 A. y is the identity function on y and _1 A. y > reverses y . A. may be more convenient in some > situations than the <@|.`</. construct. For example, > the following is a different kind of zigzag order: > > ($&0 [EMAIL PROTECTED] A."_1 i.) 5 6 > 0 1 2 3 4 5 > 11 10 9 8 7 6 > 12 13 14 15 16 17 > 23 22 21 20 19 18 > 24 25 26 27 28 29 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
