Your solution is good.  There is special code for most of it. See warnings at

http://code.jsoftware.com/wiki/Vocabulary/SpecialCombinations#Whole-Array_Operations

Another possibility is

   (($,)~ _2 */\ $) 0 2 1 3 |: > array

Henry Rich



On 12/23/2017 2:29 PM, Jimmy Gauvin wrote:
I was exploring the kind of problem lately and ended up with:

    (,.97 98 99) (,2)}"1 i. 3 3

Left rank never occurred to me.

While we're playing with structures, is there a better way to unbox boxes
of arrays than the following:

    (2 2$2)<;._3 i.6 6
┌─────┬─────┬─────┐
│0 1  │2 3  │ 4  5│
│6 7  │8 9  │10 11│
├─────┼─────┼─────┤
│12 13│14 15│16 17│
│18 19│20 21│22 23│
├─────┼─────┼─────┤
│24 25│26 27│28 29│
│30 31│32 33│34 35│
└─────┴─────┴─────┘
    > ,.&.>/ ,&.>/ (2 2$2)<;._3 i.6 6
  0  1  2  3  4  5
  6  7  8  9 10 11
12 13 14 15 16 17
18 19 20 21 22 23
24 25 26 27 28 29
30 31 32 33 34 35

maybe a tesselation inverse?



On Sat, Dec 23, 2017 at 12:52 PM, Henry Rich <henryhr...@gmail.com> wrote:

To modify acolumn:

97 98 99 (2})"0 1 i. 3 3

0 1 97

3 4 98

6 7 99


Henry Ric
​h​

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