title: How to find max value in array of dictionary
body: <p>I have this array:</p>
  <pre><code>[{
      'name': 'Chrysanthemum.jpg',
      'number': 100.0
    }, {
      'name': 'Desert.jpg',
      'number': 30.917470438414448
    }, {
      'name': 'Hydrangeas.jpg',
      'number': 15.429520638195438
    },
    {
      'name': 'Jellyfish.jpg',
      'number': 21.331146972809318
    }, {
      'name': 'Koala.jpg',
      'number': 20.341379328776572
    }, {
      'name': 'Lighthouse.jpg',
      'number': 34.424389703830229
    }, {
      'name': 'Penguins.jpg',
      'number': 25.732106503594785
    }, {
      'name': 'Tulips.jpg ',
      'number': 23.827037756867568}]
  </code></pre>
  <p>Now I want to find a item which its number is max. any idea?</p>