title: How to return true when comparing arrays with same items but in random positions?
body: <p>Compare two arrays.
  Return true if first array has same items as second array, even if they are in different positions.
  Here are two possible arrays:</p>
  
  <pre><code>int[] arrayA = { 1, 2, 3 };
  int[] arrayB = { 3, 2, 1 };
  </code></pre>
  
  <p>I can only find if arrayB has a single number in arrayA.</p>