title: Javascript: Unshift to second position of the array
body: <p>I understand this diagram:</p>
  
  <p><a href="https://i.stack.imgur.com/1pQk8.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/1pQk8.jpg" alt="Unshift/Push diagram"></a></p>
  
  <p>But now my question is... <strong>How can I add an element just in the second position of the Array?</strong></p>
  
  <p>If I have this array: <strong>(A, C, G, T)</strong> and I want to add <strong>B</strong>...</p>
  
  <p>The result that I want should be: <strong>(A, <em>B</em>, C, G, T)</strong></p>
  
  <p>Any suggestions?</p>
  
  <p><em>Thank you!</em></p>