title: Compare date inside map and get the list value
body: <p>How to get the date and list data in</p>
  <p><code>Map&lt;DateTime, List&gt; _events;</code></p>
  <p>Sample data</p>
  <p><code> _events = {</code>
  <code>_selectedDay: ['Event A7', 'Event B7', 'Event C7', 'Event D7'],</code>
  <code>_selectedDay.add(Duration(days: 1)): ['Event A8', 'Event B8', 'Event C8', 'Event D8']}</code></p>
  <p>I want to check if the date in _events if it is equal to date now and get the list</p>
  <pre><code>for(var i = 0; i&lt; _events.length; i++) {
        var list = _events[i].toString();
        print(list);
      }
  </code></pre>