title: Compare char to string in Elm
body: <p>I'd like to loop through the characters of a string and see if each is contained in another string. However, String.toList returns a list of Chars, not Strings, which isn't allowed by the String.contains function. Passing the Char to toString doesn't help, is there another way to achieve this goal, or do I just need another approach altogether?</p>
  
  <pre><code>&gt; String.contains (toString 'a') "asdf"
  False : Bool
  </code></pre>