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=begin
File: hashing_search.rb
Created Time: 2024-04-09
Author: Blue Bean (lonnnnnnner@gmail.com)
=end
require_relative '../utils/list_node'
### 哈希查找（数组） ###
def hashing_search_array ( hmap , target )
# 哈希表的 key: 目标元素，
# 若哈希表中无此 key ，返回 -1
hmap [ target ] || - 1
end
### 哈希查找（链表） ###
def hashing_search_linkedlist ( hmap , target )
# 哈希表的 key: 目标元素，
# 若哈希表中无此 key ，返回 None
hmap [ target ] || nil
end
### Driver Code ###
if __FILE__ == $0
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
map0 = { }
for i in 0 ... nums . length
map0 [ nums [ i ] ] = i # key: 元素，
end
index = hashing_search_array ( map0 , target )
puts " 目标元素 3 的索引 = #{ index } "
# 哈希查找（链表）
head = arr_to_linked_list ( nums )
# 初始化哈希表
map1 = { }
while head
map1 [ head . val ] = head
head = head . next
end
node = hashing_search_linkedlist ( map1 , target )
puts " 目标节点值 3 的对应节点对象为 #{ node } "
end
