i. 4 4
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
(<2 1) { i. 4 4
9
On Thursday, May 29, 2014, alexgian <[email protected]> wrote:
> If I want to index into a (rank 2) array to get the element usually called
> the (i,j)th in the big, bad world, is there a better way to do it than
> this, which I currently use?
>
> idx =: (1 { [) { ] {~ 0 { [
>
> 2 1 idx 4 4 $i.16
>
> 9
>
> I notice that if { takes an array as left arg, it merely returns the given
> rows of that array, rather than the required indexed element.
> So I can't do, for instance, (2 1) { 4 4 $i.16 and get what I want
> Furher, I wander if there is a more generic way of writing this so that it
> would work automatically for rank-3 arrays and greater.
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