title: Java Script for of
body: <p>Can you explain me, please, why first console.log shows me array with both:
  array.foo and item, but when I use for of loop it does not show array.foo? </p>
  
  <pre><code>let array = [3,5,8, item = 'good'];
  array.foo = 'hello';
  console.log(array);
  
  for (var i of array) {
   console.log( i);
  }
  </code></pre>