What is the purpose of List?

Question

I didn\'t even know this was doable, but I saw while perusing some code online a method with a signature like this:

public List read( ... )
         


        

Answer 1

One case in which it may be useful is if you wanted to return a collection of return values from a function. Say

static List forEach(Func func, List items) {
   List ret = new List();
   for(int i = 0; i< items.length; i++) {
     ret.add(func.call(items[i]);
   }
   return ret;
}

public static void main() {
  ...
  List boringResult = 
   forEach(
    new Func {@override Void call(Integer i) {...}});
}

Not that useful but you could see a case where it was required.