title: Iterate over values of object
body: <p>I want to iterate over all values of a map.
  I know it's possible to <a href="https://stackoverflow.com/questions/684672/loop-through-javascript-object">iterate over all keys</a>.
  But is it possible to iterate directly over the values?</p>
  
  <pre><code> var map = { key1 : 'value1', key2 : 'value2' }
   for (var key in map) { ...} // iterates over keys
  </code></pre>