你将如何在x语言中实现哈希表？

class HashTable:
    def __init__(self, size=100):
        self.size = size
        self.table = [None] * size

    def _hash(self, key):
        return hash(key) % self.size

    def add(self, key, value):
        index = self._hash(key)
        if self.table[index] is None:
            self.table[index] = [(key, value)]
        else:
            for pair in self.table[index]:
                if pair[0] == key:
                    pair = (key, value)
                    return
            self.table[index].append((key, value))

    def get(self, key):
        index = self._hash(key)
        if self.table[index] is None:
            return None
        for pair in self.table[index]:
            if pair[0] == key:
                return pair[1]
        return None