706. Design HashMap

https://leetcode.com/problems/design-hashmap/

JavaScript

/**
 * Initialize your data structure here.
 */
var MyHashMap = function() {
  this.data = {}
}

/**
 * value will always be non-negative.
 * @param {number} key
 * @param {number} value
 * @return {void}
 */
MyHashMap.prototype.put = function(key, value) {
  this.data[key] = value
}

/**
 * Returns the value to which the specified key is mapped, or -1 if this map contains no mapping for the key
 * @param {number} key
 * @return {number}
 */
MyHashMap.prototype.get = function(key) {
  return key in this.data ? this.data[key] : -1
}

/**
 * Removes the mapping of the specified value key if this map contains a mapping for the key
 * @param {number} key
 * @return {void}
 */
MyHashMap.prototype.remove = function(key) {
  delete this.data[key]
}

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

Python

class MyHashMap:

    def __init__(self):
        """
        Initialize your data structure here.
        """
        self.data = {}

    def put(self, key, value):
        """
        value will always be non-negative.
        :type key: int
        :type value: int
        :rtype: void
        """
        self.data[key] = value

    def get(self, key):
        """
        Returns the value to which the specified key is mapped, or -1 if this map contains no mapping for the key
        :type key: int
        :rtype: int
        """
        return self.data.get(key, -1)

    def remove(self, key):
        """
        Removes the mapping of the specified value key if this map contains a mapping for the key
        :type key: int
        :rtype: void
        """
        if key in self.data:
            del self.data[key]


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