55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
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// https://www.freecodecamp.org/learn/coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree
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var displayTree = (tree) => console.log(JSON.stringify(tree, null, 2));
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function Node(value) {
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this.value = value;
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this.left = null;
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this.right = null;
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}
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function BinarySearchTree() {
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this.root = null;
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// Only change code below this line
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this.inorder = () => {
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if (this.root === null) {
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return null;
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}
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const values = [];
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const traverse = (node) => {
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if (node.left !== null) traverse(node.left);
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values.push(node.value);
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if (node.right !== null) traverse(node.right);
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};
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traverse(this.root);
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return values;
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};
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this.preorder = () => {
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if (this.root === null) {
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return null;
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}
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const values = [];
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const traverse = (node) => {
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values.push(node.value);
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if (node.left !== null) traverse(node.left);
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if (node.right !== null) traverse(node.right);
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};
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traverse(this.root);
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return values;
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};
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this.postorder = () => {
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if (this.root === null) {
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return null;
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}
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const values = [];
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const traverse = (node) => {
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if (node.left !== null) traverse(node.left);
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if (node.right !== null) traverse(node.right);
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values.push(node.value);
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};
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traverse(this.root);
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return values;
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};
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// Only change code above this line
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}
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