title: Unexpected token, expected,
body: <p>creating a shopping list application with the React-Native framework. This piece of code keeps throwing an exception 'unexpected token, expected,' on line 29 (rowHasChanged...) however I have no idea what it is talking about:</p>
  
  <pre><code>constructor(props) {
  super(props);
  this.state = {
    dataSource: new ListView.DataSource({
      rowHasChanged: (row1, row2) =&gt; row1! !== row2
    })
    };
   }
  </code></pre>
  
  <p>What I'm I missing?</p>
  
  <p>Thanks </p>