Aug 8, 2023 · Jul 26, 2023 · Jul 27, 2023 · Jul 27, 2023 · Jul 27, 2023 · Aug 8, 2023
diff --git a/problems/1002.查找常用字符.md b/problems/1002.查找常用字符.md
Original file line number	Diff line number	Diff line change
Expand Up		@@ -518,6 +518,54 @@ impl Solution {
		}
		```

	Ruby:
	```ruby
	def common_chars(words)
	result = []
	#统计所有字符串里字符出现的最小频率
	hash = {}
	#初始化标识
	is_first = true

	words.each do \|word\|
	#记录共同字符
	chars = []
	word.split('').each do \|chr\|
	#第一个字符串初始化
	if is_first
	chars << chr
	else
	#字母之前出现过的最小次数
	if hash[chr] != nil && hash[chr] > 0
	hash[chr] -= 1
	chars << chr
	end
	end
	end

	is_first = false
	#清除hash,更新字符最小频率
	hash.clear
	chars.each do \|chr\|
	if hash[chr] != nil
	hash[chr] += 1
	else
	hash[chr] = 1
	end
	end
	end

	#字符最小频率hash转换为字符数组
	hash.keys.each do \|key\|
	for i in 0..hash[key] - 1
	result << key
	end
	end

	return result
	end
	```

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