title: Checking for string contents? string Length Vs Empty String
body: <p>Which is more efficient for the compiler and the best practice for checking whether a string is blank? </p>
  
  <ol>
  <li>Checking whether the length of the string == 0</li>
  <li>Checking whether the string is empty (strVar == "")</li>
  </ol>
  
  <p>Also, does the answer depend on language?</p>