title: How to map the objects that having the dynamic keys in React?
body: <pre><code>const arr = [
    {
      2671161009: {
        activityType: 'RUNNING',
        averageHeartRateInBeatsPerMinute: 134,
        comments: '',
        durationInSeconds: 3884,
        startTimeInSeconds: 1525368621,
        startTimeOffsetInSeconds: -14400,
        summaryId: '2671161009',
      },
      2671161249: {
        activityType: 'OTHER',
        averageHeartRateInBeatsPerMinute: 111,
        comments: '',
        durationInSeconds: 103,
        startTimeInSeconds: 1525372533,
        startTimeOffsetInSeconds: -14400,
        summaryId: '2671161249',
      },
    },
  ];
  </code></pre>
  
  <p>That index keys that having the is generate dynamically. How can we map this array data in React? Could you please give me the suggestion.</p>