title: Regex match partial word with nothing before but spaces allowed
body: <p>I want to match some class names in a string that start with <em>row-</em> but it can't allow characters before the match, except space. </p>
  
  <p>I've used <code>/row-/g</code> and <code>/\s?row-/g</code> and word boundaries but the problem arises when the user could possibly use a class name with foo-borrow-bar where the <em>row-</em> in borrow returns a match or <code>some-row-class</code>.</p>
  
  <p>My example string of class names i'm testing against:</p>
  
  <p><code>row-some-class foobar hello-world-row-class foo-borrow-bar row-it-is</code></p>
  
  <p>I only want to match <code>row-some-class</code> and <code>row-it-is</code></p>