mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-27 10:26:28 +08:00
48 lines
1.1 KiB
Ruby
48 lines
1.1 KiB
Ruby
|
=begin
|
|||
|
File: hashing_search.rb
|
|||
|
Created Time: 2024-04-09
|
|||
|
Author: Blue Bean (lonnnnnnner@gmail.com)
|
|||
|
=end
|
|||
|
|
|||
|
require_relative '../utils/list_node'
|
|||
|
|
|||
|
### 雜湊查詢(陣列) ###
|
|||
|
def hashing_search_array(hmap, target)
|
|||
|
# 雜湊表的 key: 目標元素,value: 索引
|
|||
|
# 若雜湊表中無此 key ,返回 -1
|
|||
|
hmap[target] || -1
|
|||
|
end
|
|||
|
|
|||
|
### 雜湊查詢(鏈結串列) ###
|
|||
|
def hashing_search_linkedlist(hmap, target)
|
|||
|
# 雜湊表的 key: 目標元素,value: 節點物件
|
|||
|
# 若雜湊表中無此 key ,返回 None
|
|||
|
hmap[target] || nil
|
|||
|
end
|
|||
|
|
|||
|
### Driver Code ###
|
|||
|
if __FILE__ == $0
|
|||
|
target = 3
|
|||
|
|
|||
|
# 雜湊查詢(陣列)
|
|||
|
nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
|
|||
|
# 初始化雜湊表
|
|||
|
map0 = {}
|
|||
|
for i in 0...nums.length
|
|||
|
map0[nums[i]] = i # key: 元素,value: 索引
|
|||
|
end
|
|||
|
index = hashing_search_array(map0, target)
|
|||
|
puts "目標元素 3 的索引 = #{index}"
|
|||
|
|
|||
|
# 雜湊查詢(鏈結串列)
|
|||
|
head = arr_to_linked_list(nums)
|
|||
|
# 初始化雜湊表
|
|||
|
map1 = {}
|
|||
|
while head
|
|||
|
map1[head.val] = head
|
|||
|
head = head.next
|
|||
|
end
|
|||
|
node = hashing_search_linkedlist(map1, target)
|
|||
|
puts "目標節點值 3 的對應節點物件為 #{node}"
|
|||
|
end
|