title: React native for loop getting index
body: <p>This is probably a super simple question, but I have the following:</p>
  
  <pre><code>let groups = [{}, {}, {}];
  
  for(let g of groups) {
      console.log(g);
  }
  </code></pre>
  
  <p>How do I get the index number of said group? Preferably without doing a count.</p>