c# - Get Length Of Columns in Jagged Array

Question

I have a problem extracting the columns length in jagged array like this:

How can I get the length of the 2nd (with index 1 and length 8) or the 5th (index 4 and length 4) column for example? Same with the rows. I need length of a specified row.

Answer 1

The method getColumnLength just goes through each row and checks if the row is long enough for the column to be in it. If it is then add it to the count of rows that have that column.

public class Program {
    public static void Main(string[] args) {
        int[][] jaggedArray = {
            new int[] {1,3,5,7,9},
            new int[] {0,2,4,6},
            new int[] {11,22} 
        };

        Console.WriteLine(getColumnLength(jaggedArray, 4));

        Console.WriteLine("Press any key to continue. . .");
        Console.ReadKey();
    }

    private static int getColumnLength(int[][] jaggedArray, int columnIndex) {
        int count = 0;
        foreach (int[] row in jaggedArray) {
            if (columnIndex < row.Length) count++;
        }
        return count;
    }
}