title: How to split a string in Ruby and get all items except the first one?
body: <p>String is
  <code>ex="test1, test2, test3, test4, test5"</code></p>
  
  <p>when I use </p>
  
  <pre><code>ex.split(",").first
  </code></pre>
  
  <p>it returns</p>
  
  <pre><code>"test1"
  </code></pre>
  
  <p>Now I want to get the remaining items, i.e.  `"test2, test3, test4, test5". If I use </p>
  
  <pre><code>ex.split(",").last
  </code></pre>
  
  <p>it returns only</p>
  
  <pre><code>"test5"
  </code></pre>
  
  <p>How to get all the remaining items skipping first one?</p>