[Dilettante_Pro]

Кривой костыль

<script>
var list = {
    value: 1,
    next: {
      value: 2,
      next: {
        value: 3,
        next: {
          value: 4,
          next: null
        }
      }
    }
  };
  
var vName = "list",
     down = true;
  
  function printList(lst) {
      console.log(lst.value);
  
      if (lst.next && down) {
         vName += ".next";
         printList(lst.next);
       }
       else {
          down = false;
          if(vName.length > 5) {
             vName = vName.substr(0,vName.length - 5);
             printList(eval(vName));
           }
       }
  }
  
  printList(list);
</script>