title: Join element in an array by two
body: <p>My array looks like this:</p>
  
  <p><code>arr = ["object 1", 3, "object 2", 6]</code></p>
  
  <p>How can I create the expected output below? Is there a simple way using <code>join</code>?</p>
  
  <p><code>object 1 (x3), object 2 (x6).</code></p>