removing rows/columns from 2d arrays

[wallaceoc80]

Hi,

I have an array of arrays decalred as follows:

double[][] egArray = new double[19][];

and populated as you would expect.

Later in the program there are situations when I want to remove a corresponding row/column e.g. egArray[2][2].

Is there any easy way of doing this without having to have a number of different loops?

Thanks,
Wallace

 

[litton1]

As far as I am aware there is no built in way to do this? If you want to get away from doing all this moving around of data then perhaps you could use the ArrayList Class?

ArrayList arraylist = new ArrayList();
....// Fill Array
.....
arraylist.RemoveAt(index);

if you use this dont forget to add
using System.Collections;


Age is a consequence of experience

 

[cappmgr]

litton1 is right so you could cast it to an ArrayList then cast it back to an Array.

using System;
using System.Collections;
class POCRemoveFromArray
{
    static void Main(string[] args)
    {
        double[][] egArray = new double[3][];
        for(int i = 0; i < 3; ++i)
        {
            egArray[i] = new double[] {1,2,3,4,5};
            foreach (double dbl in egArray[i])
            {
                Console.Write(dbl.ToString());
            }
            Console.WriteLine();
        }
        Console.WriteLine("remove element from array");
        egArray[2] = RemoveDoubleArrayItem(egArray[2],2);
        for(int i = 0; i < 3; i++)
        {
            foreach (double dbl in egArray[i])
            {
                Console.Write(dbl.ToString());
            }
            Console.WriteLine();
        }
    }
    public static double[] RemoveDoubleArrayItem(double[] doubleArray, int removeIndex) 
    {
        ArrayList doubleArrayList = new ArrayList(doubleArray);
        doubleArrayList.RemoveAt(removeIndex);
        double[] returnDoubleArray = (double[])doubleArrayList.ToArray(typeof(double));
        return returnDoubleArray;
    }
}

Marty