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122 lines
2.4 KiB
122 lines
2.4 KiB
=begin
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File: array_hash_map.rb
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Created Time: 2024-04-13
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Author: Xuan Khoa Tu Nguyen (ngxktuzkai2000@gmail.com)
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=end
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### 鍵值對 ###
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class Pair
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attr_accessor :key, :val
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def initialize(key, val)
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@key = key
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@val = val
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end
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end
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### 基於陣列實現的雜湊表 ###
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class ArrayHashMap
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### 建構子 ###
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def initialize
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# 初始化陣列，包含 100 個桶
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@buckets = Array.new(100)
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end
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### 雜湊函式 ###
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def hash_func(key)
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index = key % 100
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end
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### 查詢操作 ###
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def get(key)
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index = hash_func(key)
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pair = @buckets[index]
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return if pair.nil?
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pair.val
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end
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### 新增操作 ###
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def put(key, val)
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pair = Pair.new(key, val)
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index = hash_func(key)
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@buckets[index] = pair
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end
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### 刪除操作 ###
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def remove(key)
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index = hash_func(key)
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# 置為 nil ，代表刪除
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@buckets[index] = nil
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end
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### 獲取所有鍵值對 ###
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def entry_set
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result = []
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@buckets.each { |pair| result << pair unless pair.nil? }
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result
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end
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### 獲取所有鍵 ###
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def key_set
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result = []
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@buckets.each { |pair| result << pair.key unless pair.nil? }
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result
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end
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### 獲取所有值 ###
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def value_set
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result = []
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@buckets.each { |pair| result << pair.val unless pair.nil? }
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result
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end
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### 列印雜湊表 ###
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def print
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@buckets.each { |pair| puts "#{pair.key} -> #{pair.val}" unless pair.nil? }
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end
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end
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### Driver Code ###
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if __FILE__ == $0
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# 初始化雜湊表
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hmap = ArrayHashMap.new
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# 新增操作
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# 在雜湊表中新增鍵值對 (key, value)
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hmap.put(12836, "小哈")
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hmap.put(15937, "小囉")
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hmap.put(16750, "小算")
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hmap.put(13276, "小法")
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hmap.put(10583, "小鴨")
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puts "\n新增完成後，雜湊表為\nKey -> Value"
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hmap.print
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# 查詢操作
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# 向雜湊表中輸入鍵 key , 得到值 value
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name = hmap.get(15937)
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puts "\n輸入學號 15937 ，查詢到姓名 #{name}"
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# 刪除操作
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# 在雜湊表中刪除值對 (key, value)
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hmap.remove(10583)
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puts "\n刪除 10583 後，雜湊表為\nKey -> Value"
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hmap.print
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# 走訪雜湊表
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puts "\n走訪鍵值對 Key->Value"
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for pair in hmap.entry_set
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puts "#{pair.key} -> #{pair.val}"
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end
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puts "\n單獨篇走訪鍵 Key"
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for key in hmap.key_set
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puts key
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end
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puts "\n單獨走訪值 Value"
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for val in hmap.value_set
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puts val
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end
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end
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