title: flutter evaluate if var is integer or string
body: <p>i need to evaluate what type is a variable to make some switch,there are any way to evaluate a varible to get his type, like val() or something similar. i need to do something for integers and other for string.</p>
  
  <p>i alreaedy try to using a switch, like this,</p>
  
  <pre><code> switch (selector) {
  case  int :
    print('value is a integer');
      break;
  case  String:
      print('value is a String');
     break;
  </code></pre>
  
  <p>}</p>
  
  <p>but how i do this, if switch can allow compare mixed type of vars?</p>
  
  <p>thank you</p>