unity iterate through objects with specific script code example

Example 1: unity loop through all objects with tag

var objects = GameObject.FindGameObjectsWithTag("blah");
foreach (var obj in objects) 
{
	// whatever
}

Example 2: unity3d loop over all gameobjects

object[] obj = GameObject.FindSceneObjectsOfType(typeof (GameObject));  foreach (object o in obj)  {       GameObject g = (GameObject) o;       Debug.Log(g.name);  }