title: Help with regex
body: <p>I'm constructing a regex which will accept at least 1 alpha numerical character and any number of spaces.</p>
  
  <p>Right now I've got...<code>[A-Za-z0-9]+[ \t\r\n]*</code> which I understand to be at least 1 alphanumeric OR at least 1 space. How would I fix this?</p>
  
  <p>EDIT: To answer the comments below I want it to accept strings which contain ATLEAST 1 alphanumeric AND any number of (including no) spaces. Right now it will accept JUST a whitespace.</p>
  
  <p>EDIT2: To clarify, I don't want the any number of whitespace (including 0) to be accepted unless there is at least 1 alphanumeric character</p>