Question

How to extract a column from a rectangular array to a one-dimensional array in C#

Answer 1

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        string[,] rectangularArray = new string[3, 3] {
            {"a", "b", "c"},
            {"d", "e", "f"},
            {"g", "h", "i"}
        };

        int colNum = 1;

        object[] column = Enumerable.Range(0, rectangularArray.GetLength(0))
                            .Select(row => (object) rectangularArray[row, colNum])
                            .ToArray();

        Console.Write(string.Join(", ", column));
        
    }
}


/*
run:

b, e, h

*/

 

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