42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
'''
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File: hashing_search.py
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Created Time: 2022-11-26
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Author: timi (xisunyy@163.com)
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'''
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import sys, os.path as osp
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sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
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from include import *
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""" 哈希查找（数组） """
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def hashing_search(map,target):
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# 哈希表的 key: 目标元素，value: 索引
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# 若哈希表中无此 key ，返回 -1
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return map.get(target,-1)
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""" 哈希查找（链表） """
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def hashing_search1(map,target):
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# 哈希表的 key: 目标元素，value: 节点对象
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# 若哈希表中无此 key ，返回 -1
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return map.get(target,-1)
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if __name__=='__main__':
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target=3
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# 哈希查找（数组）
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nums=[1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
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map=dict() # 初始化哈希表
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for i in range(len(nums)):
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map[nums[i]]=i # key: 元素，value: 索引
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index=hashing_search(map,target)
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print("目标元素 3 的索引 = " ,index)
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# 哈希查找（链表）
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head=list_to_linked_list(nums)
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map1=dict() # 初始化哈希表
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while head:
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map1[head.val]=head # key: 结点值，value: 结点
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head=head.next
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node=hashing_search1(map1,target)
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print("目标结点值 3 的对应结点对象为 " , node)
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