title: regex to strip leading zeros treated as string
body: <p>I have numbers like this that need leading zero's removed.</p>
  
  <p>Here is what I need: </p>
  
  <p><code>00000004334300343</code> -> <code>4334300343</code></p>
  
  <p><code>0003030435243</code> -> <code>3030435243</code></p>
  
  <p>I can't figure this out as I'm new to regular expressions. This does not work:</p>
  
  <pre><code>(^0)
  </code></pre>