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118 lines
2.9 KiB
Python
118 lines
2.9 KiB
Python
"""
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File: array_hash_map.py
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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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class Pair:
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"""鍵值對"""
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def __init__(self, key: int, val: str):
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self.key = key
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self.val = val
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class ArrayHashMap:
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"""基於陣列實現的雜湊表"""
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def __init__(self):
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"""建構子"""
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# 初始化陣列，包含 100 個桶
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self.buckets: list[Pair | None] = [None] * 100
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def hash_func(self, key: int) -> int:
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"""雜湊函式"""
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index = key % 100
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return index
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def get(self, key: int) -> str | None:
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"""查詢操作"""
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index: int = self.hash_func(key)
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pair: Pair = self.buckets[index]
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if pair is None:
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return None
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return pair.val
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def put(self, key: int, val: str):
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"""新增和更新操作"""
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pair = Pair(key, val)
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index: int = self.hash_func(key)
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self.buckets[index] = pair
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def remove(self, key: int):
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"""刪除操作"""
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index: int = self.hash_func(key)
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# 置為 None ，代表刪除
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self.buckets[index] = None
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def entry_set(self) -> list[Pair]:
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"""獲取所有鍵值對"""
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result: list[Pair] = []
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for pair in self.buckets:
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if pair is not None:
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result.append(pair)
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return result
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def key_set(self) -> list[int]:
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"""獲取所有鍵"""
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result = []
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for pair in self.buckets:
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if pair is not None:
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result.append(pair.key)
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return result
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def value_set(self) -> list[str]:
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"""獲取所有值"""
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result = []
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for pair in self.buckets:
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if pair is not None:
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result.append(pair.val)
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return result
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def print(self):
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"""列印雜湊表"""
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for pair in self.buckets:
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if pair is not None:
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print(pair.key, "->", pair.val)
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"""Driver Code"""
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if __name__ == "__main__":
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# 初始化雜湊表
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hmap = ArrayHashMap()
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# 新增操作
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# 在雜湊表中新增鍵值對 (key, value)
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hmap.put(12836, "小哈")
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hmap.put(15937, "小囉")
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hmap.put(16750, "小算")
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hmap.put(13276, "小法")
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hmap.put(10583, "小鴨")
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print("\n新增完成後，雜湊表為\nKey -> Value")
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hmap.print()
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# 查詢操作
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# 向雜湊表中輸入鍵 key ，得到值 value
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name = hmap.get(15937)
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print("\n輸入學號 15937 ，查詢到姓名 " + name)
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# 刪除操作
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# 在雜湊表中刪除鍵值對 (key, value)
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hmap.remove(10583)
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print("\n刪除 10583 後，雜湊表為\nKey -> Value")
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hmap.print()
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# 走訪雜湊表
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print("\n走訪鍵值對 Key->Value")
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for pair in hmap.entry_set():
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print(pair.key, "->", pair.val)
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print("\n單獨走訪鍵 Key")
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for key in hmap.key_set():
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print(key)
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print("\n單獨走訪值 Value")
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for val in hmap.value_set():
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print(val)
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