title: I need an unique regex that requires at least on letter and disallows + and any form of blank space
body: <p>I broke it down to two, but I'm wondering if it's possible in one.</p>
  
  <p>My two regex</p>
  
  <pre><code>/^[^\s+ ]+$/
  
  /(.*[a-zA-Z].*)/
  </code></pre>