title: Destructuring of es6 but passing dynamic variable
body: <p>Says my <code>state</code> is like this:</p>
  <pre><code>{
    item:{
        a:'a',
        b:'b'
    }
  }
  </code></pre>
  <p>Then I'm able to pull <code>a</code> from item by doing:</p>
  <p><code>const { a } = this.state.item</code></p>
  <p>but can pull dynamically using <code>{}</code> of <code>es6</code> ?</p>
  <p>For example <code>const { variable } = this.state.item</code>, where <code>variable</code> can be <code>a</code> or <code>b</code>.</p>