How convert a list to int[][]

Question

I have a class piece where I define each piece shape.

myShape.Add(new piece
        {
            Height = 3,
            Width = 2,
            Name = "3x2 L TopRight",
            Size = 4,
            Shape = new int[][] {
                        new int[] { 1, 0 },
                        new int[] { 1, 0 },
                        new int[] { 1, 1 }
                    }
        });

But I create those shape by hand, now I reading the pieces in real time, so I create something like

List<int[]> virtualRow = new List<int[]>();
virtualRow.Add(new int[] { 1, 0 });
virtualRow.Add(new int[] { 1, 0 });
virtualRow.Add(new int[] { 1, 1 });

So how can I create Shape using virtualRow ?

I try something like

Shape = new int[][] { virtualRow.ToArray() }

But say

Cannot implicitly convert type 'int[][]' to 'int[]'

Answer 1

virtualRow.ToArray() is already an array of array of int values. You don't need to create a new array of array of ints and add this to it.

All you need is:

Shape = virtualRow.ToArray(),

Answer 2

virtualRow is a List of integer arrays, so to get an array of integer arrays you simply write:

Shape = virtualRow.ToArray();

...the return type of List.ToArray() being T[] as required.

Your code is in error because it attempts to add an int[][] to Shape instead of creating Shape as an int[][] .

Answer 3

You want to do the following:

Shape  = virtualRow.ToArray();

Since virtualRow is already a list of arrays. The ToArray function creates an int[][] object for your virtualRow , and all you need to do is store it to shape. What you were trying to do was create a matrix, within which was the result of the ToArray function. This way you are just storing the result of the function which gives you what you want.