title: Getting the most frequent value from an array
body: <p>I have an array like the following</p>
  
  <pre><code>String[] football_club = {"Barcelona", "Real Madrid", "Chelsea", "Real Madrid", "Barcelona", "Barcelona"};
  
  //result
  Sting result_club = "a value most in the array"
  </code></pre>
  
  <p>From the array above, the <strong>"Barcelona"</strong> which has a value which often exist in the array.<br>
  How coding to find the value that appears most frequently in an array?</p>