Ah thanks, I need to read the dictionary pages more carefully for those little things.
A couple of times I've found myself wanting to convert a number into a list of its digits - what is the best approach for this? This is way I've found: 0".,' ',.":123 1 2 3 Though it seems slightly clunky? Also, I try to define it as a verb and I'm not sure why I'm getting a syntax error with it: atol=: 3 :'0".,' ',.":y' |syntax error | atol=: 3 :'0".,'',.":y' Finally, how might one write that as a tacit verb? Thanks. On 13 Sep 2011, at 01:00, Roger Hui wrote: > 2 x: 999r1000 > 999 1000 > > But suppose you didn't have 2 x: y? > > % 1 +. 999r1000 > 1000 > (% 1&+.) 999r1000 > 999 > > denominator=: %@(1&+.) > numerator=: % 1&+. > > ] x=: (+%)/ 20$1x > 10946r6765 > denominator x > 6765 > numerator x > 10946 > > > > ----- Original Message ----- > From: David Vaughan <purpleblue...@googlemail.com> > Date: Monday, September 12, 2011 16:48 > Subject: Re: [Jprogramming] Inserting verbs into list > To: Programming forum <programming@jsoftware.com> > >> Thanks. I did try that but for some reason thought it hadn't worked! >> On a vaguely related note, if I have a fraction, e.g. 999r1000, >> how can I isolate the numerator and denominator? >> I was thinking of formatting as a string, and then I can do this: >> >> 'r' i. ":999r1000 >> 1 1 1 0 1 1 1 1 >> >> I was hoping to be able to go from there to by knowing where the >> 'r' is, but I can't think of how to do it. I'm still finding it >> hard to stop thinking like it's C. >> >> On 12 Sep 2011, at 14:08, Raul Miller wrote: >> >>> On Mon, Sep 12, 2011 at 8:57 AM, David Vaughan >>> <purpleblue...@googlemail.com> wrote: >>>> I'm trying to achieve this calculation: >>>> %1+%2+%1+%1+%4+%1... >>>> >>>> Essentially I want to insert +% in between each item in a >> list. I thought this could be achieved with / or @ but I seem to >> be wrong. >>>> >>>> Any help would be appreciated. >>> >>> (+%)/1 2 1 1 4 1 >>> 1.39286 >>> %(+%)/1 2 1 1 4 1 >>> 0.717949 > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
