111 lines
2.2 KiB
C++
111 lines
2.2 KiB
C++
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/**
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* File: array_hash_map.cpp
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* Created Time: 2022-12-14
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* Author: msk397 (machangxinq@gmail.com)
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*/
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#include "../utils/common.hpp"
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/* <20><>ֵ<EFBFBD><D6B5> */
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struct Pair {
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public:
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int key;
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string val;
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Pair(int key, string val) {
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this->key = key;
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this->val = val;
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}
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};
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/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ֵĹ<D6B5>ϣ<EFBFBD><CFA3> */
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class ArrayHashMap {
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private:
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vector<Pair *> buckets;
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public:
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ArrayHashMap() {
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// <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><E9A3AC><EFBFBD><EFBFBD> 100 <20><>Ͱ
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buckets = vector<Pair *>(100);
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}
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~ArrayHashMap() {
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// <20>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>
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for (const auto &bucket : buckets) {
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delete bucket;
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}
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buckets.clear();
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}
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/* <20><>ϣ<EFBFBD><CFA3><EFBFBD><EFBFBD> */
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int hashFunc(int key) {
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int index = key % 100;
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return index;
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}
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/* <20><>ѯ<EFBFBD><D1AF><EFBFBD><EFBFBD> */
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string get(int key) {
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int index = hashFunc(key);
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Pair *pair = buckets[index];
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if (pair == nullptr)
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return "";
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return pair->val;
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}
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/* <20><><EFBFBD>Ӳ<EFBFBD><D3B2><EFBFBD> */
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void put(int key, string val) {
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Pair *pair = new Pair(key, val);
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int index = hashFunc(key);
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buckets[index] = pair;
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}
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/* ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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void remove(int key) {
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int index = hashFunc(key);
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// <20>ͷ<EFBFBD><CDB7>ڴ沢<DAB4><E6B2A2>Ϊ nullptr
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delete buckets[index];
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buckets[index] = nullptr;
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}
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/* <20><>ȡ<EFBFBD><C8A1><EFBFBD>м<EFBFBD>ֵ<EFBFBD><D6B5> */
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vector<Pair *> pairSet() {
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vector<Pair *> pairSet;
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for (Pair *pair : buckets) {
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if (pair != nullptr) {
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pairSet.push_back(pair);
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}
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}
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return pairSet;
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}
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/* <20><>ȡ<EFBFBD><C8A1><EFBFBD>м<EFBFBD> */
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vector<int> keySet() {
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vector<int> keySet;
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for (Pair *pair : buckets) {
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if (pair != nullptr) {
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keySet.push_back(pair->key);
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}
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}
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return keySet;
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}
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/* <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>ֵ */
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vector<string> valueSet() {
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vector<string> valueSet;
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for (Pair *pair : buckets) {
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if (pair != nullptr) {
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valueSet.push_back(pair->val);
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}
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}
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return valueSet;
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}
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/* <20><>ӡ<EFBFBD><D3A1>ϣ<EFBFBD><CFA3> */
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void print() {
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for (Pair *kv : pairSet()) {
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cout << kv->key << " -> " << kv->val << endl;
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}
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}
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};
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> array_hash_map_test.cpp
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