CODEWITHSUNDEEP
c#arrays
bulliedMonster
bulliedMonster

Reputation: 256

add an element at a certain position of a char array?

Want to add an element at a certain position of a char array. Tried to use Concat but showed error, maybe some reference was missing. Also tried to find similar question but found none.

Please see following code and to add element at the end of the array and also at any index of that array.

                         char[] c = { 'a','b','c','d' };

                         //add elements.

                         // c.Concat//c.add//[c.Length] = 'e';

Thanks.

Upvotes: 2

Views: 4320

Answers (4)

Hooman Bahreini
Hooman Bahreini

Reputation: 15559

You can try this: 

var myList = new char[] { 'a','b','d','e' }.ToList();
myList.Insert(2, 'c');
// View the results: "a,b,c,d,e"

Upvotes: 2

Michał Turczyn
Michał Turczyn

Reputation: 37377

Array has this disadvantage, that it has fixed size and in order to add elements you have to resize it, which is inconvinient.

I would suggest you to use some collection, like List to perform such operations.

For example:

List<char> chars = new List<char>{ 'a','b','c','d' };
// add character at the end
chars.Add('e');

You can read more here.

Upvotes: 1

Guillermo Guti&#233;rrez
Guillermo Guti&#233;rrez

Reputation: 17819

The array size is static, so you can't add elements to it. However, if you really, really want to insert an element into it, you can resize the array, then shift the elements from the desired position one place to the right, and then set the new element. For example you can have this function:

public static void InsertInArray(ref char[] array, char element, int pos)
{
    // Check that index is inside the bounds
    if (pos < 0 || pos > array.Length)
    {
        throw new IndexOutOfRangeException();
    }

    // Resize the array
    Array.Resize(ref array, array.Length + 1);

    // Shift elements one place to the right, to make room to new element
    for (int i = array.Length - 1; i > pos; i--)
    {
        array[i] = array[i-1];
    }

    // Set new element
    array[pos] = element;
}

Then, for example:

public static void Main()
{       
    var myChars = new char[] { 'b', 'c', 'e' };

    // Insert in position 0
    InsertInArray(ref myChars, 'a', 0);

    // Print array: a,b,c,e
    Console.WriteLine(string.Join(",", myChars));

    // Insert in position 3
    InsertInArray(ref myChars, 'd', 3);

    // Print array: a,b,c,d,e
    Console.WriteLine(string.Join(",", myChars));

    // Insert in position 5
    InsertInArray(ref myChars, 'f', 5);

    // Print array: a,b,c,d,e,f
    Console.WriteLine(string.Join(",", myChars));
}

Full example: https://dotnetfiddle.net/pLhTzP

Upvotes: 4

Reza Mousazadeh
Reza Mousazadeh

Reputation: 148

use somthing like this:

var list = c.ToList();
list.Insert(int index, char item)

Upvotes: 0

Related Questions