title: What is inside an empty index of a Hashmap?
body: <p>I have a hashmap that is 101 keys in size, but I know for sure about 6 of those have no data inside, and there may be more without data as well. What exactly is inside the empty indexes? Is it null? or is there a Hash(index).isEmpty() method that I can use to see if its empty?</p>
  
  <p>I realize there is a isEmpty method inside hashmap, but I thought that only checked if the entire map was empty not just a single index.</p>