title: Assign value to elements in array from Object properties and different Array
body: <p>Hey I would like to create a new array, from those two elements looking like this:</p>
  <pre><code>var a = {szerokosc: 42, wysokosc: 53, dlugosc: null}    // an object
  var b = ['dlugosc', '*', 'szerokosc', '+', 'wysokosc']  // an array
  </code></pre>
  <p>The code must work if the correct name is found.
  At the End I hope to receive an array like this one:</p>
  <pre><code>var c = ['0', '*', '42', '+', '53']
  </code></pre>
  <p>If anyone can tell me how to achieve this, I'd appreciate it. Thanks in advance.</p>