inorder
const inorderTraversal = root => {
if (!root) {
return []
}
return [...inorderTraversal(root.left), root.val, ...inorderTraversal(root.right)]
}
Comment
const inorderTraversal = root => {
if (!root) {
return []
}
return [...inorderTraversal(root.left), root.val, ...inorderTraversal(root.right)]
}