Arrays & Lists in C# for Unity

I learned about Arrays & Lists in Unity…

15th Programs:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ArrayExample : MonoBehaviour
{
    // Example - 1
    int _number = 12;
    int[] _numberArray = new int[4];  // Declaring Array

    // Example - 2
    string[] _names = { "Elon", "Mark", "Sundar", "Albert" };  // Assigning values in array

    // Example - 3
    public GameObject[] _players; // Public // Array of GameObject type
    // [SerializeField] GameObject[] _players;  // Private

    // Start is called before the first frame update
    void Start()
    {
        _numberArray[0] = 10;
        _numberArray[1] = 23;
        _numberArray[2] = 53;
        _numberArray[3] = 15;

        //Debug.Log(_numberArray[0]);
        _players = GameObject.FindGameObjectsWithTag("Player");
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            _players = GameObject.FindGameObjectsWithTag("Enemy");
        }
    }
}

From above program:

void Start()
    {
        _numberArray[0] = 10;
        _numberArray[1] = 23;
        _numberArray[2] = 53;
        _numberArray[3] = 15;
//Debug.Log(_numberArray[0]);
        _players = GameObject.FindGameObjectsWithTag("Player");
    }  

_players = GameObject.FindGameObjectsWithTag("Player");

• The GameObject having Tag named Player will get assigned to GameObject array named _players…

if (Input.GetKeyDown(KeyCode.Space))
        {
            _players = GameObject.FindGameObjectsWithTag("Enemy");
        }

• If space key is pressed then it is going to take _players array and is going to reassign with all the different GameObjects that has a tag as Enemy insted…

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ListExample : MonoBehaviour
{
    List<string> _numbers = new List<string>();
    
    // Start is called before the first frame update
    void Start()
    {
        _numbers.Add("Elon");     //  --0
        _numbers.Add("Mark");     //  --1
        _numbers.Add("Sundar");   //  --2
        _numbers.Add("Albert");   //  --3

        _numbers.Remove("Elon");
        
        _numbers.Insert(1, "Arjun");
        
        Debug.Log(_numbers[0]);
        
        Debug.Log(_numbers[1]);
        
        Debug.Log(_numbers[2]);
        
        // Debug.Log(_numbers[3]);
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}

From above program:

List<string> _numbers = new List<string>();

• This is how we can instantiate a list… This is not actually a datatype. This is a class that exits someware inside System.Collections.Generic…

_numbers.Remove("Elon");

• This removes Elon and now the 0 index of list named _numbers will become Mark…

_numbers.Insert(1, "Arjun");

• This will insert Arjun at 1 index i.e. _numbers.Remove(“Elon”); will remove Elon, then 0 index will be Mark then 1 index will be Arjun as we are inserting at 1, 2 index will be Sundar and so on…

Debug.Log(_numbers[0]);

• This grabs the 0 index of list named _numbers i.e Elon…And same as Debug.Log(_numbers[1]); will grab the 1 index of list named _numbers i.e Mark…and so on…

That’s all…Thank you for reading😉:)

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