anchor.diff:      }
   }
   
  -getType(variable) {
  +$getType(variable) {
       if(variable is num)
           return 0;
       else if(variable is $PyString)
  
positive.code: any(iterable) {
      var i;
      for(i in iterable){
          switch(getType(i)){
              case -1:
                  return i;
              case 0:
  
negative.code: all(iterable) {
      var i;
      for(i in iterable){
          switch($getType(i)){
              case -1:
                  return i;
              case 0:
  