title: how to find first alphabetic character from a string
body: <p>Lets say I have a string <code>"12345.6789abcd23"</code>
  so my string starts with a numbers then alphabetic characters then it may contains other numbers 
  so what I want is <code>"12345.6789"</code> and <code>"abcd23"</code>
  please note that this is just an example so <code>indexOf()</code> will not help,
  if I can get the index of first alphabetic that would be great </p>