title: Immutable js : how to compare List with same contents and different ordered?
body: <p>I am trying to compare different orderd List of Immutable js. 
  I thought "equals" would be work, but it is only true when is same order.</p>
  
  <p>is there any way to compare for containing same content?</p>
  
  <pre class="lang-js prettyprint-override"><code>var list1 = Immutable.List.of({a:1},2,{b:3},4);
  var list2 = Immutable.List.of(2,{a:1},4,{b:3});
  console.log(list1.equals(list2)) //false
  </code></pre>