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