rebuild target list when gameobject destroyed

Questions & Answers
1

im trying to get my targeting list to rebuild when the gameobject destroys (Enemy)
im using the EnemyHealth script and the Targeting script

EnemyHealth script

this has the destroy function

/// 
/// EnemyHealth.cs
/// A basic script display the health of a mob in game
/// 
/// This script is ment to be attached to a mob, or a mob prefab
/// 
using UnityEngine;
using System.Collections;

public class EnemyHealth : MonoBehaviour {
	public int maxHealth = 100;
	public int curHealth = 100;
	
	public float healthBarLength;

	// Use this for initialization
	void Start () {
		healthBarLength = Screen.width / 2;
	}
	
	// Update is called once per frame
	void Update () {
		AddjustCurrentHealth(0);
	}
	
	void OnGUI() {
		GUI.Box(new Rect(10, 40, healthBarLength, 20), curHealth + "/" + maxHealth);
	}
	
	public void AddjustCurrentHealth(int adj) {
		curHealth += adj;
		
		if(curHealth < 0)
			curHealth = 0;
		
		if(curHealth > maxHealth)
			curHealth = maxHealth;
		
		if(maxHealth < 1)
			maxHealth = 1;
		
		if(curHealth <= 0)
{
    Destroy(this.gameObject);

}
		
		healthBarLength = (Screen.width / 2) * (curHealth / (float)maxHealth);
	}
}

Targeting script

list is the targeting list im trying to have rebuild on (Enemy)destroy

/// 
/// TargetMob.cs
/// This script can be attached to any permanent gameobject, and is responsible for allowing the player to target different mobs that are with in range
/// 
using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Targetting : MonoBehaviour {
	public List<Transform> targets;
	public Transform selectedTarget;

	private Transform myTransform;
		

	// Use this for initialization
	void Start () {
		targets = new List<Transform>();
		selectedTarget = null;
		myTransform = transform;
		
		AddAllEnemies();
		
	}
	
	
	public void AddAllEnemies() {
		GameObject[] go = GameObject.FindGameObjectsWithTag("Enemy");
		
		foreach(GameObject enemy in go)
			AddTarget(enemy.transform);
	}
	
	public void AddTarget(Transform enemy) {
		targets.Add(enemy);
	}
	
	
	private void SortTargetsByDistance() {
		targets.Sort(delegate(Transform t1, Transform t2) {
				return Vector3.Distance(t1.position, myTransform.position).CompareTo(Vector3.Distance(t2.position, myTransform.position));
				});
	}
	
	//if we do not have an enemy targeted ywt, then find the clostest one and target him
	//if we do have an enemy targeted, then get the next target
	//if we have the last target in the list, then get then first target in the list
	private void TargetEnemy() {
		if(selectedTarget == null) {
			SortTargetsByDistance();
			selectedTarget = targets[0];
			

		}
		else {
			int index = targets.IndexOf(selectedTarget);
			
			if(index < targets.Count - 1) {
				index++;
			}
			else {
				index = 0;
			}
			DeselectTarget();
			selectedTarget = targets[index];
		}
		SelectTarget();
			
	}
	
	private void SelectTarget() {
		selectedTarget.renderer.material.color = Color.red;
		
		PlayerAttack pa = (PlayerAttack)GetComponent("PlayerAttack");
		
		pa.target = selectedTarget.gameObject;
	}
	
	private void DeselectTarget() {
		selectedTarget.renderer.material.color = Color.white;
		selectedTarget = null;

	}

	
	// Update is called once per frame
	void Update () {
		if(Input.GetKeyDown(KeyCode.Tab))
			TargetEnemy();
			
	}
	
	
}
2

Maybe you could just remove the killed guys from your list at the start of TargetEnemy - references to destroyed objects become null, thus you can identify and delete them with something like this:

private void TargetEnemy(){
   // remove all null transforms:
   while (targets.Remove(null));
   // the original code goes here:
   if(selectedTarget == null) {
     ...