node-and-queue.js

class Queue {
    constructor() {
        this.items = [];
    }

    enq(obj) {
        this.items.push(obj);
    }

    deq() {
        return this.items.shift();
    }

    isEmpty() {
        return this.items.length === 0;
    }
}


class Node{
  constructor(value,children=[]){
    this.value       = value;
    this.children    = children;
  }
}



var node5 = new Node(5);
var node4 = new Node(4);
var node3 = new Node(3, [node4, node5]);
var node2 = new Node(2);
var node1 = new Node(1, [node2, node3]);


/*
      1

    /    \

  2        3
          /   \
         4     5


*/