You can also use p: to find the totient of a number. (- ~:) &. q: 12 4 5 p:12 4
If you want to see the flow of the hook, put the cursor on your expression and press F2. It is interesting to note the the inverse of q: is */ . On Sun, Apr 2, 2017 at 1:48 AM, Raul Miller <rauldmil...@gmail.com> wrote: > Are you asking about trains (hooks and forks)? > > http://www.jsoftware.com/help/dictionary/dictf.htm > > Thanks, > > -- > Raul > > > On Sun, Apr 2, 2017 at 3:39 AM, Martin Kreuzer <i...@airkreuzer.com> > wrote: > > Hi all - > > > > In section 'Primes' of the Vocabul I found this line of code (at the very > > end, function no 5): > > > > (- ~:) &. q: y > > > > I do know that it is another way to calculate the totient of y, and > > I'm somehow familiar with the use of (~:) and (&.) and (q:), but > > have not yet found any documentation of this construct (- ~:) > > [btw, these seem to work too (+ ~:), (* ~:), (% ~:)] > > > > Where should I explore further..? > > > > -M > > > > ---------------------------------------------------------------------- > > 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
