Delete

Introduction The delete algorithm is perhaps one of the hardest parts of managing a binary search tree (BST). Code Example final class BSTNode { var val: Int? var left: BSTNode? var right: BSTNode? init(val: Int? = nil) { self.val = val } func delete(_ val: Int) -> BSTNode? { // 1 guard let selfVal = self.val else { return nil } // 2 if val < selfVal { if self.left == nil { return self } self....