That's because "~:" is a single symbol - a space in the middle turns it into two distinct symbols.
2011/9/29 Linda Alvord <[email protected]> > Here is the space that is bothering me. The different results are > dependent > upon the space before the colon. > > d=: 13 : '/:~ :/:@": &.>y' > d a,b > ------T-----┐ > │01123│01123│ > L-----+------ > > e=: 13 : '/:~:/:@": &.>y' > e a,b > 0 1 > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of David Mitchell > Sent: Thursday, September 29, 2011 6:24 AM > To: Programming forum > Subject: Re: [Jprogramming] Permutations > > I find this helpful to see differences: > > /:~ :/:@": &.>a,b > -- ~ --- /: > -- : -+- /: > -- @ -+- ": > -- &. -+- > > │ > --+ -- a > L------+- , > L- b > > > /:~:([:/:": )&.>a,b > -- /: > │ -- ~: > │ │ -- [: > --+ │ ----+- /: > │ +- &. -+ L- ": > L----+ L- > > │ > │ -- a > L------+- , > L- b > > -- > David Mitchell > > On 9/29/2011 5:45, Linda Alvord wrote: > > The only difference between the correct and the incorrect result is a > space > > before the second : . Should a space make a difference ever? In the > > correct result I can't understand what it is, what it does and why it > does > > it. > > > > /:~ :/:@":&.>a,b > > ------T-----┐ > > │01123│01123│ > > L-----+------ > > > > > > /:~:([:/:": )&.>a,b > > 0 1 > > > > Since I set out originally to remove "atop", how can I do it? > > > > /:~ :([: /: ":)&.>a,b > > ------T-----┐ > > │10123│32110│ > > L-----+------ > > > > Hope you can help. Thanks. Linda > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Ian Clark > > Sent: Thursday, September 22, 2011 9:13 PM > > To: Programming forum > > Subject: Re: [Jprogramming] Permutations > > > > Off-the-cuff... > > > > a=: 10123 > > b=: 32110 > > c=: 32100 > > -:/ /:~ :/:@":&.> a,b > > 1 > > -:/ /:~ :/:@":&.> a,c > > 0 > > > > > > On Thu, Sep 22, 2011 at 10:41 PM, David Vaughan > > <[email protected]> wrote: > >> Hi, what is the best (fastest) way to check whether a number is a > > permutation of another number? > >> I've tried listing all permutations of one number and checking whether > the > > other number is in the list of permutations. This seems pretty slow, so I > > was hoping for a faster method. > >> > >> Thanks. > >> ---------------------------------------------------------------------- > >> 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 > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
