title: JSON Data with RxJS Observables: Filter not working
body: <p>First of all: <a href="http://plnkr.co/edit/5CD7s245AbVZxfnm4qzT?p=preview" rel="nofollow">Plunkr Example is here</a>  <code>&lt;-- NOW: WORKING EXAMPLE (edited)</code></p>
  
  <p>This is the data:</p>
  
  <pre><code>[
    {
      "label": "One",
      "value": 1
    }, 
    {
      "label": "Two",
      "value": 2
    }, 
    {
      "label": "Three",
      "value": 3
    }
  ]
  </code></pre>
  
  <p>This is the filter:</p>
  
  <pre><code>  http.get('./data.json')
    .map(data =&gt; data.json())
    .filter ( 
      (x,index) =&gt; return x[index].value === 2
    )
    .subscribe(data =&gt; this.d = data);
  </code></pre>
  
  <p>I would like to get as result:</p>
  
  <pre><code>{
    "label": "Two",
    "value": 2
  }
  </code></pre>
  
  <p>Maybe I've a blackout, where is the mistake?</p>