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