using System;

using System.Collections.Generic;

using System.Text;

//using Newtonsoft.Json;

​

namespace FlattenArrayExample

{

    public static class Program

    {

        public static void Main()

        {

​

            //arrange

            #region arrange section

                #region jagged array sample

                    int[][] jaggedArray;

                    jaggedArray = new int[3][];

                    jaggedArray[0] = new int[1];

                    jaggedArray[1] = new int[2];

                    jaggedArray[2] = new int[3];

​

                    jaggedArray[0][0] = 1;

                    jaggedArray[1][0] = 2;

                    jaggedArray[1][1] = 3;

                    jaggedArray[2][0] = 4;

                    jaggedArray[2][1] = 5;

                    jaggedArray[2][2] = 6;

                #endregion jagged array sample

​

                #region nested array sample

                    object[][] nestedArray;

                    nestedArray = new object[3][];

                    nestedArray[0] = new object[1];

                    nestedArray[1] = new object[2];

                    nestedArray[2] = new object[3];

​

                    nestedArray[0][0] = new object[] { 4,5,6, new object[3] { 6,7,8} };

​

                    nestedArray[1][0] = 2;

                    nestedArray[1][1] = 3;

                    nestedArray[2][0] = 4;

                    nestedArray[2][1] = 5;

                    nestedArray[2][2] = 6;

                #endregion nested array sample

            #endregion

​

            //act

            //var flattenedArray = ArrayUtils.GetFlattenedIntArray(jaggedArray);

            var flattenedArray = ArrayUtils.GetFlattenedIntArray(nestedArray);

​

            //check

            if (flattenedArray != null)

            {

                var flattenedArraySerialized = new StringBuilder();

                foreach (var el in flattenedArray)

                {

                    flattenedArraySerialized.Append(string.Format("{0},",el));

                }

                Console.WriteLine(string.Format("flattened array -> [{0}]", flattenedArraySerialized));

            }

            Console.ReadLine();

        }

​

    }

​

    public static class ArrayUtils

    {

​

        public static int[] GetFlattenedIntArray(object jaggedArray)

        {

​

            var flattenedArray = new List<int>();

​

            var jaggedArrayType = jaggedArray.GetType();

            var expectedType = typeof(int);

​

            if (jaggedArrayType.IsArray)

            {

                if (expectedType.IsAssignableFrom(jaggedArrayType.GetElementType()))

                {

                    foreach (var el in jaggedArray as int[])

                    {

                        flattenedArray.Add(el);

                    }

                }

                else

                {

                    foreach (var el in jaggedArray as object[])

                    {

                        foreach (var retIntEl in GetFlattenedIntArray(el))

                        {

                            flattenedArray.Add(retIntEl);

                        }

                    }

​

                }

            }

            else if (jaggedArrayType == expectedType)

            {

                flattenedArray.Add((int)jaggedArray);

            }

            else

            {

                return new int[0];

            }

​

            return flattenedArray.ToArray();

        }

​

    }

​

}

​