Good example of pattern programming
[spoiler]
>From first sight it seems unfit, but |. indeed fixes
it nicely. For u`v/ rolling result is needed.
First I got a direct result
(3 (-~ ,~ [) 5) p. (i.@>:%]) 10
3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
made it tacit with multiple arguments
((],-)~/@}: p. (i.@>:%])@{:) 3 5 10
3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
and then fitted into the u`v/ pattern:
(p. i.@>: % ])~`(],-)/@|. 3 5 10
3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
> From: Raul Miller <[EMAIL PROTECTED]>
>
> If I wanted to make steps be more concise I would probably use
> steps =: {. - -/@}: * (i.@>: % ])@{:
>
> Anyways, I don't see much room for improvement, there.
> From: Brian Schott <[EMAIL PROTECTED]>
>
> Ok, "steps" is an awkward match, but I believe it
> can be forced into u`v/ gerund (almost).
>
>
> stps =: ([EMAIL PROTECTED]:@[*i.@>:@] % {:@])~`(],-)/@|.
> From: Brian Schott <[EMAIL PROTECTED]>
>
> What about expanding it to another widely used
> verb, steps?
>
> steps =: {. + (1&{ - {.) * (i.@>: % ])@{:
> steps 3 5 10
> 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
