title: How do I convert a comma-separated string into an array?
body: <p>Is there any way to convert a comma separated string into an array in Ruby? For instance, if I had a string like this:</p>
  
  <pre><code>"one,two,three,four"
  </code></pre>
  
  <p>How would I convert it into an array like this?</p>
  
  <pre><code>["one", "two", "three", "four"]
  </code></pre>