How to delete an object if there is another object of the same type at that position ?

Questions & Answers
1

Hi,I am doing a simple randomGeneration,my generation code works fine but it has a tendency to spawn more than 1 tile at a give position so i have made the script below to delete the gameobejects if another one of their kind is at their position,but it doesn’t work it deletes non overlapping objects aswell.

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class DestroyOnTouch : MonoBehaviour {
	public List<GameObject> walls = new List<GameObject>();
	public List<GameObject> tiles = new List<GameObject>();

	void Start () 
	{
		Invoke ("Destroy",2f);
	}

	void Destroy()
	{
		walls.AddRange(GameObject.FindGameObjectsWithTag("Walls"));
		tiles.AddRange(GameObject.FindGameObjectsWithTag("Tile"));

		StartCoroutine(DestroyWalls());
		StartCoroutine(DestroyTiles());
	}

	IEnumerator DestroyWalls ()
	{
		yield return null;
		for(int c = 0; c < walls.Count; c++)
		{
			for(int y = 0; y < walls.Count; y++)
			{			
				if(c > y || y > c)
				{
					//yield return new WaitForSeconds(0.1f);
					if(walls

.transform.position == walls[y].transform.position)
    					{
    						Destroy(walls[y],0.1f);
    						walls.Remove(walls[y]);
    					}
    				}
    			}
    		}
    	}
    
    	IEnumerator DestroyTiles ()
    	{
    		yield return null;
    		for(int c = 0; c < walls.Count; c++)
    		{
    			for(int y = 0; y < tiles.Count; y++)
    			{			
    				if(c > y || y > c)
    				{
    					//yield return new WaitForSeconds(0.1f);
    					if(tiles[c].transform.position == tiles[y].transform.position)
    					{
    						Destroy(tiles[y],0.1f);
    						walls.Remove(tiles[y]);
    					}
    				}
    			}
    		}
    	}
    }
2

Eliminating the problem where it comes from is probably the better idea. For the random generator:

Create a List of as many positions as you need, or all from which you want to pick (like a triple for loop for x, y and z). use your generator to pick a random position from the list of unique positions and delete the ones you picked already.