Combination of two integer array

Deer Park

I have two list of int array, say Input1 and Input2.

List Input1;
List Input2;

Data in Input1 would look be - {1,2,3},{4,5,6},{8,9,10}
Data in Input 2 can be {11,12,13},{14,15,16}

The final combined result should be look like - {1,2,3,11,12,13}, {1,2,3,14,15,16},{4,5,6,11,12,13},{4,5,6,11,12,13},{8,9,10,11,12,13},{8,9,10,14,15,16}

How can I achieve that? Also is there any efficeint way to solve this, since I will have few hundreds of int array on both Input1 and Input 2 list.

4 Replies

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Vulpes13y ago
Accepted answer
Try the following which should be reasonably efficient even for much larger lists of arrays:

using System;
using System.Collections.Generic;
using System.Linq;

class Test
{
static void Main()
{
var Input1 = new List(){new[]{1,2,3},new[]{4,5,6},new[]{8,9,10}};
var Input2 = new List(){new[]{11,12,13},new[]{14,15,16}};
var Input3 = (from a1 in Input1 from a2 in Input2 select a1.Concat(a2).ToArray()).ToList();

// check it worked

foreach(int[] a3 in Input3)
{
Console.WriteLine(String.Format("{{{0}}}", String.Join(",", a3)));
}

Console.ReadKey();
}
}
Deer Park13y ago
Thank you!
Deer Park13y ago
Perfect!! Worked perfectly...Thanks a lot..Appreciated!!
Chintan Rathod13y ago
Hi Deer,

You can use "AddRange" method of list.

example,

firstList.AddRange(secondList);

Reference
----------
http://msdn.microsoft.com/en-us/library/z883w3dc.aspx

Thanks.