How Can I Find indices of an element in 2D array??

Question

_{Thursday, December 26, 2013 7:47 PM}

int index=Array.indexOf(MyArray,(Object Array)sender);

is not working in this case what do I do??

I'm trying to find the indices of an element in 2D array, how has raise the event. 

All replies (3)

_{Friday, December 27, 2013 12:24 PM ✅Answered | 2 votes}

Create a class with a method to find  index. Check this. 

public static class ExtensionMethods
{
    public static Tuple<int, int> CoordinatesOf<T>(this T[,] matrix, T value)
    {
        int w = matrix.GetLength(0); // width
        int h = matrix.GetLength(1); // height

        for (int x = 0; x < w; ++x)
        {
            for (int y = 0; y < h; ++y)
            {
                if (matrix[x, y].Equals(value))
                    return Tuple.Create(x, y);
            }
        }

        return Tuple.Create(-1, -1);
    }
}

Then call below code:

var coordinates = MyArray.CoordinatesOf((Object)sender);

See if it helps.

Kunal G

_{Thursday, December 26, 2013 9:27 PM | 1 vote}

Have you tried simple loops, with right sizes?

int found_i = -1;
int found_j = -1;

for(int i = 0; i < 100 && found_i < 0; ++i)
{
    for(int j = 0; j < 200; ++j)
    {
        if( MyArray[i,j] == (object)sender) // (or maybe 'object.ReferenceEqual')
        {
            found_i = i;
            found_j = j;
            break;
        }
    }
}

_{Friday, December 27, 2013 10:58 AM}

Thankx.. and yes i have tried before with same loops but i was not using found_i variable thats why is was getting error index out of bound exception.. :)