Note however:
split ;:'this is an example'
┌──────┬───────────────┐
│┌────┐│┌──┬──┬───────┐│
││this│││is│an│example││
│└────┘│└──┴──┴───────┘│
└──────┴───────────────┘
13 :' ({.y);}.y' ;:'this is an example'
┌──────┬──┬──┬───────┐
│┌────┐│is│an│example│
││this││ │ │ │
│└────┘│ │ │ │
└──────┴──┴──┴───────┘
Do you see the difference?
Do you see why the difference occurs?
Hint:
http://www.jsoftware.com/help/dictionary/d330.htm
(search for the word "boxed")
Thanks
--
Raul
On Fri, Mar 28, 2014 at 6:32 AM, Linda Alvord <[email protected]>wrote:
> Nice example.
>
> A=:'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
> f=: 13 :' ({.y);}.y'
> f A
> ┌─┬─────────────────────────┐
> │A│BCDEFGHIJKLMNOPQRSTUVWXYZ│
> └─┴─────────────────────────┘
> 7 f A
> ┌───────┬───────────────────┐
> │ABCDEFG│HIJKLMNOPQRSTUVWXYZ│
> └───────┴───────────────────┘
>
> f
> {. ; }.
>
> -----Original Message-----
> From: [email protected] [mailto:
> [email protected]] On Behalf Of Raul Miller
> Sent: Thursday, March 27, 2014 11:46 PM
> To: Programming forum
> Subject: [Jprogramming] lost art
>
> I am continually struck by how difficult it is to find relevant
> information.
>
> Once upon a time, I had hopes that search engines would help resolve such
> issues, but more and more I'm seeing their limitations (and the limitations
> of the groups of people running them). And, similarly, for educational
> institutions. And, similarly, for books. Each of these have limitations -
> working together they can achieve a lot, but ultimately it's up to the
> individual to have the drive and interest to piece things together.
>
> Anyways, here's an example: split
>
> split 1 2 3
> ┌─┬───┐
> │1│2 3│
> └─┴───┘
>
> In other words: given a list, return the pair (first; rest). Or, more
> precisely:
>
> {. ,&< }.
>
> This is kind of a fun concept (though, frankly, it's often better to work
> with flat data - trying to introduce habitual abstractions often gets in
> the way of getting to where you want to go).
>
> Still, I remember times when I wanted something like split and I could not
> think of how to find it. So I had to reinvent it, or something similar. I'm
> not sure why this bothers me, but it does.
>
> Also, this is a nice example of monadic and dyadic definitions having a
> nice simularity:
>
> 4 split 'abcdefghi'
> ┌────┬─────┐
> │abcd│efghi│
> └────┴─────┘
>
> It's just a minor thing, but it's still food for thought.
>
> Thanks,
>
> --
> Raul
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