title: Convert a string into array of words
body: <p>How do I separate a string into a list/array of white space separated words. </p>
  
  <pre><code>let x = "this is my sentence";;
  </code></pre>
  
  <p>And store them inan list/array like this:</p>
  
  <pre><code> ["this", "is", "my", "sentence"]
  </code></pre>