Design of Nodes

[zlmonroe]

The design of Nodes in the project is bad and does not follow proper OOP (open-closed) principles as pointed out by @JonathanBush. One way to fix this is by making nodes children based on a hashmap system so that the generic parent node could support any layout by default. I.E.

class Node {
     constructor() {
         this.children = {};
     }
}

class NodeChild {
    constructor(leftNode, rightNode) {
         super.children["left"] = leftNode;
         super.children["right"] = rightNode;
    }
}

This would allow, for example a generic iterator to work by getting the keys (positions) with the child node corresponding to it.