title: Foreach data in response
body: <p>I used to work with JSON on this way:</p>
  
  <pre><code>this.http.get('http://localhost:3000/SumOfDipVolume').subscribe(res =&gt; {
    for (let dipVolume of res['result']) {
      // some code
  });
  </code></pre>
  
  <p>But now I don't want to hit object <em>result</em>, because my JSON object does not include <em>result</em> object. This is my JSON file:</p>
  
  <pre><code>[
    {
      "Title": "DYNAMIC DISEL 50PPM",
      "UpValue": "122,196",
      "DownValue": "-148,740.83",
      "Procentage": "45.10%"
    },
    {
      "Title": "DYNAMIC UNLEADED 95",
      "UpValue": "121,905",
      "DownValue": "-285,527.35",
      "Procentage": "29.92%"
    }
  ]
  </code></pre>
  
  <p>Now I must use some like this: <code>for (let dipVolume of res) {</code>
  but angular tells me:
  Type object is not an array type or a string type.
  <strong>How to iterate this?</strong></p>