¿Creo que estoy usando 'esto' incorrectamente? No estoy seguro de cómo proceder. Aquí están los métodos que estoy usando.

 function BinarySearchTree(value) { this.value = value; this.right = null; this.left = null; } BinarySearchTree.prototype.add = function(value) { node = this; if (value < this.value) { if (this.left) this.left.add(value); else this.left = new BinarySearchTree(value); } if (value > this.value) { if (this.right) this.right.add(value); else this.right = new BinarySearchTree(value); } } BinarySearchTree.prototype.leftHeight = function(root = this.value) { if (this.value == null) { return 0; } let queue = []; queue.push(this); let leftHeight = 0; while (1 == 1) { let nodeCount = queue.length; if (nodeCount == 0) { return leftHeight - 1; } leftHeight++; while (nodeCount > 0) { let newNode = queue.shift(); if (newNode.left != null) { queue.push(newNode.left); } nodeCount--; } } } BinarySearchTree.prototype.rightHeight = function(root = this.value) { if (this.value == null) { return 0; } let queue = []; queue.push(this); let rightHeight = 0; while (1 == 1) { let nodeCount = queue.length; if (nodeCount == 0) { return rightHeight - 1; } rightHeight++; while (nodeCount > 0) { let newNode = queue.shift(); if (newNode.right != null) { queue.push(newNode.right); } nodeCount--; } } } BinarySearchTree.prototype.balanceFactor = function(this) { console.log(this.leftHeight) return this.leftHeight - this.rightHeight; }

Y aquí está la entrada y las pruebas que estoy ejecutando...

 let binarySearchTree = new BinarySearchTree; binarySearchTree = new BinarySearchTree(5); binarySearchTree.left = new BinarySearchTree(2) binarySearchTree.right = new BinarySearchTree(3); binarySearchTree.right.right = new BinarySearchTree(1); console.log(binarySearchTree.rightHeight()); console.log(binarySearchTree.leftHeight()); console.log(binarySearchTree.balanceFactor())

Los últimos 3 registros de la consola generan 2, 1 y NaN. ¡Entonces mis métodos de altura izquierda y derecha funcionan correctamente! ¿Alguien puede decirme por qué mi método 'balanceFactor' no funciona?

¡Gracias y felices fiestas!