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