CODEWITHSUNDEEP
c#arrayslistint
J.Funder
J.Funder

Reputation: 3

Adding an int array to a list without it only takes the last version of the array

This is a simplified version of the problem im trying to solve. Im trying to add an int[] to a List, but it updates all the arrays in the List with the one from the last iteration. Why is that? And how does I solve this problem? This isn't a problem if it's just 1 int for example.

intArray = new int[9];

for (int i = 0; i < 9; i++)
{
    intArray[i] = i;
}

Test.Add(intArray);

for (int i = 0; i < 9; i++)
{
     intArray[i] = i * 2;
}

Test.Add(intArray);

foreach (var item in Test)
{
   for (int i = 0; i < 9; i++)
   {
       Console.WriteLine(item[i]);
   }
}

Console.ReadKey();
}

public static int[] intArray { get; set; }
public static List<int[]> Test = new List<int[]>();

Upvotes: 0

Views: 77

Answers (2)

Abubakar
Abubakar

Reputation: 374

after u added your intArray object into your arraylist ,simply create another object of that

intArray = new int[length];

hope it will works

Upvotes: 0

Kushan
Kushan

Reputation: 10695

Using new keyword you create intArray only once. Then there is only one reference. After that you add intArray reference to collection List for multiple times.

Try this,

intArray = new int[9];

for (int i = 0; i < 9; i++)
{
     intArray[i] = i;
}

Test.Add(intArray);

intArray = new int[9]; // create new intArray here

for (int i = 0; i < 9; i++)
{
     intArray[i] = i * 2;
}

Test.Add(intArray);

Upvotes: 1

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