title: Empty object being used as an array in JavaScript
body: <p>I am new to JavaScript and learning. 
  I see some code where variable is declared as <code>abcBean={};</code></p>
  
  <p>and then being used as</p>
  
  <pre><code>abcBean[SOME_SET.KEY] = false
  </code></pre>
  
  <p>Can someone please explain how an empty object is being used as an array?</p>