This TypeScript constructor function initializes an instance with a key and an optional value.
The key
parameter is typically used to uniquely identify an object or element
within a data structure. It serves as a reference or identifier for accessing or manipulating the
associated value or data.
Optional
value: VThe value
parameter in the constructor is optional, meaning it does not
have to be provided when creating an instance of the class. If a value is not provided, it will
default to undefined
.
Represents a node in a binary tree.
Template: BinaryTreeNode<K,
V> - The type of the family relationship in the binary tree.