Converting 3D-Array to List in C#

Krus Published at Dev

Krus

For easily finding values in a huge Array I want to use the "find"-Command of a List. The problem is, right now it is not a List, it is a 3D-Array.

This means, i need to convert my double[,,]-array to a

List<List<List<double>>> blabla

Example of an Array:

double[,,] myArray = new double[2,3,3];

Could look then like the following:

myArray[1,:,:] =  1.11 1.12 1.13
                  1.21 1.22 1.23
                  1.31 1.32 1.33

myArray[2,:,:] =  2.11 2.12 2.13
                  2.21 2.22 2.23
                  2.31 2.32 2.33

Can this be done by a one-liner using somehow the "Cast" command?

Thanks

Enigmativity

Given your double[,,] myArray you can do this:

var blabla = 
    myArray
        .Cast<double>()
        .Select((v, n) => new
        {
            x = n / (myArray.GetLength(2) * myArray.GetLength(1)),
            y = (n / myArray.GetLength(2)) % myArray.GetLength(1),
            value = v,
        })
        .GroupBy(q => q.x)
        .Select(q =>
            q
                .GroupBy(
                    w => w.y,
                    w => w.value)
                .Select(e => e.ToList())
                .ToList())
        .ToList();

That gives you the List<List<List<Double>>> that you're looking for.

And all in a one-liner!

Collected from the Internet

Please contact [email protected] to delete if infringement.