How to tell if two blocks are right next to each other?(2D)

I am making a 2d game and want to tell if two 1x1 blocks are right next to each other. How would I do this? Here is the script I made:

#pragma strict
var Extractor : GameObject;
var Resource : GameObject;

function Update () {
if(Extractor.transform.position.x == Resource.transform.position.x + 1 || Extractor.transform.position.x == Resource.transform.position.x - 1 ){
	Debug.Log("Extract");
}
}

Any advice? Thanks in advanced.

The code above should work. But if your game is a grid of 2d blocks you should be storing references to them in a 2d array.

var blockArray : GameObject[,];

If the array coords correspond to 1 unit blocks in world space, you can do this :

var extIntX : int = Mathf.FloorToInt (Extractor.transform.position.x);
var extIntZ : int = Mathf.FloorToInt (Extractor.transform.position.z);

var canExtract : boolean = false;

if (blockArray [extIntX-1, extIntZ].tag = "Resource") { canExtract = true;}
if (blockArray [extIntX+1, extIntZ].tag = "Resource") { canExtract = true;}
if (blockArray [extIntX, extIntZ-1].tag = "Resource") { canExtract = true;}
if (blockArray [extIntX, extIntZ+1].tag = "Resource") { canExtract = true;}

if (canExtract) {
Debug.Log ("Extract");
}

Not fully working as is, you have to set it up in functions and initialize stuff, as well as check to avoid ArrayIndexOutOfRangeExceptions when you’re at the edges- but that should give you the general idea.