The J Forum is the most useful part of the documentation. J without the Forum would be like J without the immediate execution window. It would be like trying to code C while sober.
-Dan -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of mijj Sent: Tuesday, August 02, 2011 11:08 AM To: Programming forum Subject: Re: [Jprogramming] Ragged Length Array Addition LOL ... OMG .. yes .. now i remember it .. such a fundamental thing too. (Honest - at one time it was one of the few things i was familiar with in J and wouldn't have had a problem) I guess once i got my head stuck into using J, i expect everything to be complicated, so i look for complicated solutions. Yes .. the dictionary .. there's a million and one things in the dictionary .. and that was one of them. Just didn't occur to me (now that i forgot about it) that the problem had an atomic solution. Does the human body of the J Programming Forum count as part of the dictionary? It has a more useful lookup facility. On 2011-08-02 11:26, R.E. Boss wrote: > > ; 1 2; 1 2 3 > 1 2 1 2 3 > > Perhaps you should read the dictionary. > > (;;) 1 2; 1 2 3 > +-----------+---------+ > |+---+-----+|1 2 1 2 3| > ||1 2|1 2 3|| | > |+---+-----+| | > +-----------+---------+ > > > R.E. Boss > > >> -----Oorspronkelijk bericht----- >> Van: [email protected] [mailto:programming- >> [email protected]] Namens mijj >> Verzonden: dinsdag 2 augustus 2011 8:54 >> Aan: Programming forum >> Onderwerp: Re: [Jprogramming] Ragged Length Array Addition >> >> [(2 _2) +&.> (6&*)&.> 1 2; 1 2 3] worked .. but i wanted to combined it > into >> one expression. >> >> - for me at the moment, getting an understanding of J is more important >> than a bare result. (And i didn't like the exra box op.) >> >> another prob i'm having, which ought to be simple is: >> creating a concatenated list from boxed lists: >> >> i.e. >> Jmagic 1 2;3 4 5 >> NB. -> 1 2 3 4 5 >> >> i can do : >> a,b [ 'a b' =. 1 2; 1 2 3 >> NB. -> 1 2 3 4 5 >> >> but i feel i ought to be able to do this as some sort of variant of f&:> 1 > 2; 1 2 3 >> where [f] involves some [,] activity. >> >> .. My water tells me this should be a simple expression. But i cant seem > to >> apply a [,] before a filler [0] is added to the short list. >> >> On 2011-08-01 22:06, Johann Hibschman wrote: >>> mijj<[email protected]> writes: >>> >>>> d'oh .. i missed out one step .. i wanted to multiply the lot by 6 >>>> before doing the addition. >>>> >>>> i had (2 _2) +&.> (6&*)&.> 1 2; 1 2 3 >>>> >>>> .. it was combining the [+&.>] and [(6&*)&.>] that was eluding me. >>> >>> I'm confused: that works fine for me. Wasn't it working for you? >>> >>> -Johann >>> >>> ---------------------------------------------------------------------- >>> 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
