이진 검색 트리

/* 

                    Example For Binary Search Tree
                              __10__
                            /        \  
                           5         13
                          / \       / \
                         2   7     11 16 
                        /\   \         \
                       1 3   9         18

*/

class Node {
    constructor(value){
        this.value = value;
        this.left = null;
        this.right = null;

    }
}
class BinarySearchTree {
    constructor(){
        this.root = null;
    }


    // Insert a New value in tree 
    insert(value) {
        var newNode = new Node(value);
        if(this.root === null) {
            this.root = newNode;
            return this;
        } else {
            var current = this.root;
            while(true) {
                if(value < current.value) {
                    if(current.left === null) {
                        current.left = newNode;
                        console.log(` ->   ${current.value}  left value -> ${value} added `)
                        return this;    
                    } else {
                        current = current.left;
                    }
                } else if(value > current.value) {
                    if (current.right === null) {
                        current.right = newNode;
                        console.log(` ->   ${current.value}  right value -> ${value} added `)
                        return this;
                    } else {
                        current = current.right;
                    }
                } 
                if(current.value == value) {
                    console.log(` ->  ${value} is  Duplicate value Please Enter Unique Value `)
                    return;
                }
            }
        }
    }

 // find The Value in tree
    find(value) {
           if(this.root === null) return false;
           var current = this.root,
               found = false;
           while(current && !found) {
               if(value < current.value) {
                   current = current.left;
               } else if (value > current.value) {
                   current = current.right;
               } else {
                   console.log(`Founded Successfully -> ${value}`);
                   return current;
               }
           }
           if(!found) console.log(`Not Founded -> ${value}`);
           return current;
    }

 // Same as on find
    contains(value) {
       if(this.root === null) return false;
       var current = this.root,
           found = false;
       while(current && !found) {
           if(value < current.value) {
               current = current.left;
           } else if (value > current.value) {
               current = current.right;
           } else {
               console.log(`Founded Successfully -> ${value}`);
               return current;
           }
       }
       if(!found) console.log(`Not Founded -> ${value}`);
       return current;
}
}

var tree = new BinarySearchTree();
tree.insert(10)
tree.insert(5)
tree.insert(13)
tree.insert(2)
tree.insert(7)
tree.insert(11)
tree.insert(16)