Span and two dimensional Arrays

Question

Is it possible to use the new System.Memory Span struct with two dimensional arrays of data?

double[,] testMulti = 
    {
        { 1, 2, 3, 4 },
        { 5, 6, 7, 8 },
        { 9, 9.5f, 10, 11 },
        { 12, 13, 14.3f, 15 }
    };

double[] testArray = { 1, 2, 3, 4 };
string testString = "Hellow world";

testMulti.AsSpan(); // Compile error
testArray.AsSpan();
testString.AsSpan();

Whilst testArray and testString have a AsSpan extension, no such extension exists for testMulti.

Is the design of Span limited to working with single dimensional arrays of data?
I've not found an obvious way of working with the testMulti array using Span.

Answer 1

As John Wu already mentioned spans are one dimensional. You could of course implement a 2D span yourself, but Microsoft already did that for us.

Have a look into the docs here.
You can find the addressing nuget package here.
The package also provides a Memory2D.

 var arr = new int[,] { {1,2,3},{2,2,3},{3,2,3} };
 var spn = arr.AsSapn2D();
 // Now use it similar to a normal span
 // The access is of course a bit different since we are using a 2D data structure.
 Console.WriteLine(spn[0..2,..]);