title: Find the location of a character in string
body: <p>I would like to find the location of a character in a string. </p>
  
  <p>Say: <code>string = "the2quickbrownfoxeswere2tired"</code></p>
  
  <p>I would like the function to return <code>4</code> and <code>24</code> -- the character location of the <code>2</code>s in <code>string</code>. </p>