ValueType* atMap (struct hashMap * ht, KeyType k)
{
	int idx = stringHash2(k) % ht->tableSize;
	if (idx < 0){
		idx += ht->tableSize;
	}
	struct hashLink* current = ht->table[idx];
	while(current){
			if(strcmp(current->key, k)==0){
				ValueType* isVal = &(current->value);
				return isVal;
			}
			current=current->next;
	}
	return NULL;
}