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invert binary tree javascript

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xnimax answered on May 25, 2021 Popularity 9/10 Helpfulness 5/10

answer invert binary tree javascript

related Invert Binary Tree in js

related invert binary tree js

invert binary tree javascript

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function invertTree(head) {
  if (head) {
    var temp = head.left;
    head.left = head.right;
    head.right = temp;

    invertTree(head.left);
    invertTree(head.right);
  }

  return head;
}

Popularity 9/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: binary-tree javascript

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Contributed on May 25 2021

xnimax

0 Answers Avg Quality 2/10

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Invert Binary Tree in js

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"use strict"

/*
  - invert a binary tree from its normal form

     BEFORE       AFTER
       a            a
      / \          / \  
     b   c        c   b
    / \   \      /   / \
   d   e   f    f   e   d

*/

// BEFORE = ["a", "b", "d", "e", "c", "f"]
// AFTER  = ["a", "c", "f", "b", "e", "d"]

// === Main Function === //

const invertBT = (root) => {
  if (!root) return []

  let temp = root.left
  root.left = root.right
  root.right = temp

  const leftValues = invertBT(root.left)
  const rightValues = invertBT(root.right)

  return [root.val, ...leftValues, ...rightValues]
}

// create binary tree
const createBT = (root) => {
  if (!root) return []

  const leftValues = createBT(root.left)
  const rightValues = createBT(root.right)

  return [root.val, ...leftValues, ...rightValues]
}

// create Node class
class Node {
  constructor(val) {
    this.val = val
    this.left = null
    this.right = null
  }
}

// create BT
const a = new Node("a")
const b = new Node("b")
const c = new Node("c")
const d = new Node("d")
const e = new Node("e")
const f = new Node("f")

// direction and position to BT
a.left = b
a.right = c
b.left = d
b.right = e
c.right = f

// call a functions
console.log(`BEFORE INVERT: ${createBT(a)}`)
console.log(`AFTER INVERT:  ${invertBT(a)}`)

// export function
module.exports = {
  invertBT
}

Popularity 6/10 Helpfulness 6/10 Language javascript

Source: Grepper

Tags: binary-tree javascript

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Contributed on Dec 21 2022

Jozvan

0 Answers Avg Quality 2/10

invert binary tree js

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function invertTree(node) {
  if(!node) return;
  [node.left, node.right] = [node.right, node.left];
  invertTree(node.left);
  invertTree(node.right);
  return node;
}

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: binary-tree javascript j

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Contributed on Apr 14 2022

Outrageous Octopus

0 Answers Avg Quality 2/10

invert binary tree javascript

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