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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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### 键值对 ###
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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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### 基于数组实现的哈希表 ###
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class ArrayHashMap
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### 构造方法 ###
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def initialize
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# 初始化数组，包含 100 个桶
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@buckets = Array.new(100)
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end
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### 哈希函数 ###
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def hash_func(key)
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index = key % 100
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end
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### 查询操作 ###
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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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### 添加操作 ###
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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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### 删除操作 ###
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def remove(key)
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index = hash_func(key)
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# 置为 nil ，代表删除
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@buckets[index] = nil
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end
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### 获取所有键值对 ###
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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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### 获取所有键 ###
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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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### 获取所有值 ###
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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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### 打印哈希表 ###
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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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# 初始化哈希表
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hmap = ArrayHashMap.new
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# 添加操作
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# 在哈希表中添加键值对 (key, value)
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hmap.put(12836, "小哈")
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hmap.put(15937, "小啰")
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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, "小鸭")
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puts "\n添加完成后，哈希表为\nKey -> Value"
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hmap.print
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# 查询操作
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# 向哈希表中输入键 key , 得到值 value
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name = hmap.get(15937)
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puts "\n输入学号 15937 ，查询到姓名 #{name}"
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# 删除操作
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# 在哈希表中删除值对 (key, value)
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hmap.remove(10583)
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puts "\n删除 10583 后，哈希表为\nKey -> Value"
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hmap.print
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# 遍历哈希表
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puts "\n遍历键值对 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单独篇遍历键 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单独遍历值 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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