How to clear an array

Question

I have a global variable int[] and I want to clear its data and fill it again in a loop.

How could this possible in C#?

Answer 1

  int[] x 
  int[] array_of_new_values

  for(int i = 0 ; i < x.Length && i < array_of_new_values.Length ;i++)
  {
        x[i] = array_of_new_values[i]; // this will give x[i] its new value
  }

Why clear it? Just assign new values.

Answer 2

Wouldnt it be easier to use a list instead.

public List<int> something = new List<int>();

And then:

something.Add(somevalue);

And to clear:

something.Clear();

Answer 3

This is not correct answer for your post but you can use this logic according to your need. Here is a code Snippets taken from here

using System;

class ArrayClear
{

   public static void Main()
   {
      int[] integers = { 1, 2, 3, 4, 5 };
      DumpArray ("Before: ", integers);
      Array.Clear (integers, 1, 3);
      DumpArray ("After:  ", integers);
   }

   public static void DumpArray (string title, int[] a)
   {
      Console.Write (title);
      for (int i = 0; i < a.Length; i++ )
      {
         Console.Write("[{0}]: {1, -5}", i, a[i]);
      }
      Console.WriteLine();
   }
}

and output of this is:

Before: [0]: 1    [1]: 2    [2]: 3    [3]: 4    [4]: 5
After:  [0]: 1    [1]: 0    [2]: 0    [3]: 0    [4]: 5

Answer 4

Why not just create new array and assign it to existing array variable?

x = new int[x.length];

Answer 5

For two dimensional arrays, you should do as bellow:

Array.Clear(myArray, 0, myArray.GetLength(0)*myArray.GetLength(1));

Answer 6

The static Array.Clear() method "sets a range of elements in the Array to zero, to false, or to Nothing, depending on the element type". If you want to clear your entire array, you could use this method an provide it 0 as start index and myArray.Length as length:

Array.Clear(myArray, 0, myArray.Length);