title: Reset component state in React Native
body: <p>I want to reset the state of only certain (not all) states.
  On the click of a button, values of <code>present_count</code>, <code>total_count</code>, <code>present</code> and <code>total</code> should be set to their initial state (0). While the state of <code>subjects</code> and <code>text</code> should remain intact.</p>
  
  <pre><code>constructor(props) {
      super(props);
      this.state = { 
        subjects: [],
        text: "",
        present_count: [0, 0, 0, 0, 0, 0, 0],
        total_count: [0, 0, 0, 0, 0, 0, 0],
        present: 0,
        total: 0
      }
  }
  </code></pre>
  
  <p><strong>EDIT:</strong>
  I am using <code>AsyncStorage</code> to save the modified state.</p>