LeetCode 706번 Design HashMap JavaScript

문제

Design a HashMap without using any built-in hash table libraries.

Implement the MyHashMap class:

• MyHashMap() initializes the object with an empty map.

• void put(int key, int value) inserts a (key, value) pair into the HashMap. If the key already exists in the map, update the corresponding value.

• int get(int key) returns the value to which the specified key is mapped, or -1 if this map contains no mapping for the key.

• void remove(key) removes the key and its corresponding value if the map contains the mapping for the key.

문제 출처

706. Design HashMap

나의 풀이

var MyHashMap = function() {
    this.map = new Array(1000001);
};

/** 
 * @param {number} key 
 * @param {number} value
 * @return {void}
 */
MyHashMap.prototype.put = function(key, value) {
    this.map[key] = value;
};

/** 
 * @param {number} key
 * @return {number}
 */
MyHashMap.prototype.get = function(key) {
    return this.map[key] ?? -1;
};

/** 
 * @param {number} key
 * @return {void}
 */
MyHashMap.prototype.remove = function(key) {
    this.map[key] = undefined;
};

/** 
 * Your MyHashMap object will be instantiated and called as such:
 * var obj = new MyHashMap()
 * obj.put(key,value)
 * var param_2 = obj.get(key)
 * obj.remove(key)
 */