How ca I delete an entire row from an 2d array? I want to keep deleting 1 row from the array shipPosition,untill it doesn`t have any elements.
shipPosition -= shipPosition[0,0]
and
shipPosition -= shipPosition[0,1]
E.g.
int[,] shipPosition = new int[3, 2];
shipPosition[0, 0] = 2;
shipPosition[0, 1] = 3;
shipPosition[1, 0] = 4;
shipPosition[1, 1] = 5;
shipPosition[2, 0] = 6;
shipPosition[2, 1] = 7;
In C# arrays (of whatever dimension) are of fixed size. You can change the content of an element, but you can't add or remove elements (and therefor rows).
You'll need to write (or find from a third party) a class that manages this for you (much like List<T> effectively allows changing the number of elements in a 1D array).
I suggest to change collection's type: List<int[]> (list of arrays) instead of 2d array:
List<int[]> shipPosition = new List<int[]>() {
new int[] {2, 3}, // 1st line
new int[] {4, 5}, // 2nd line
new int[] {6, 7}, // ...
};
Now, if you want to remove enrire row (say the top one, {2, 3}), just do it
shipPosition.RemoveAt(0);
Approach with for loop
public static int[,] DeleteRow(int rowDeleteIndex, int[,] sourceArray)
{
int rows = sourceArray.GetLength(0);
int cols = sourceArray.GetLength(1);
int[,] result = new int[rows - 1, cols];
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
if (i != rowDeleteIndex)
{
result[i >= rowDeleteIndex ? i - 1 : i, j] = sourceArray[i, j];
}
}
}
return result;
}
so you can
int[,] shipPosition = new int[3, 2] { { 2, 3 }, { 4, 5 }, { 6, 7 } };
int[,] result = DeleteRow(1, shipPosition);
