Hi!

Would you please help me transforming this imperative code into functional 
one?

The code is a typical snippet in imperative style. A lot of mutations that 
I don't even know how to start morphing it to Clojure.

class Container {
  Map<String, Container> children;
  String letter;
  List<String> value;
}

void insert(Container container, String letters, String value) {
  
  for (int i = 0; i < letters.length; i++) {

    String letter = new String(letters.chatAt[i]);

    if (container.children.get(letter) != null) {
      container = container.children.get(letter);
    } else {
      Map<Container> childContainer = new HashMap<>();
      container.children.put(letter, childContainer);
      container = container.children.get(letter);
    }

   if (i == letters.length() - 1) {
     container.values.add(value);
     break;
   }

} 


Thanks for help and time.

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