title: Regex - At least one alphanumeric character and allow spaces
body: <p>I want to make sure a first name field has at least one alphanumeric character and also allow spaces and dashes.</p>
  
  <pre><code>**VALID**
  
  David
  Billie Joe
  Han-So
  
  **INVALID**
  -
  
  Empty is also invalid
  </code></pre>