Transposing a static array

[Ali Çehreli via Digitalmars-d-learn]

On 02/19/2016 06:00 PM, maik klein wrote:
> How would I transpose
>
> float[3][2]
>
> to
>
> float[2][3]
>
> with http://dlang.org/phobos/std_range.html#.transposed
>
>

Because static arrays are not ranges, they must be used as slices with 
the help of []. The following code does the same thing in two different 
ways:

import std.stdio;
import std.range;
import std.algorithm;

void main() {
     float[3][2] arr = [ [1, 2, 3],
                         [4, 5, 6] ];

     // Method A
     {
         float[][] arr2;

         foreach (ref a; arr) {
             arr2 ~= a[];
         }

         writeln(arr2.transposed);
     }

     // Method B
     {
         auto r = arr[].map!((ref a) => a[]).array.transposed;
         writeln(r);
     }
}

Ali