title: Add multiple identical elements to array in swift
body: <p>How would I add multiple identical elements to an array?</p>
  
  <p>For instance, if the array was:</p>
  
  <pre><code>["Swan", "Dog"]
  </code></pre>
  
  <p>and I wanted to turn it into:</p>
  
  <pre><code>["Swan", "Dog", "Cat", "Cat", "Cat", "Cat", "Cat", "Cat", "Cat", "Cat", "Cat", "Cat"]
  </code></pre>
  
  <p>(adding 10 <code>Cat</code>s)</p>
  
  <p>It there a simple command I can do, which does not use a loop?</p>