Just in time

A recursing function. Figure out the section name only when actually needed.

Code

    function fAsk(iName){
        if($IsTop(iName)){
            return "";
        };
        if($IsTop(parent(iName))){
            return $SiblingOrder;
        }
    return fAsk($Path(parent(iName)))+"."+$SiblingOrder;
    };

Logic

• If the top, $IsTop should be true 
• If parent is the top, return $SiblingOrder
• Otherwise,
  • ask the parent for their name,
  • and then add "." and own $SiblingOrder.

Pros and Cons

• GOOD:
  • Only computes the section numbers when needed
  • Recursion is elegant
• BAD:
  • Recursion can be tricky