将Ruby哈希值转换为人类可读的字符串

require 'digest'

def hash_to_readable_string(input)
  # 计算输入值的哈希值
  hash = Digest::SHA256.hexdigest(input.to_s)
  
  # 将哈希值转换为可读的字符串
  readable_string = ""
  hash.each_char.with_index do |char, index|
    # 每两个字符组成一个16进制数，并将其转换为对应的ASCII字符
    if index % 2 == 0
      hex = "#{hash[index]}#{hash[index+1]}"
      decimal = hex.to_i(16)
      readable_string << decimal.chr
    end
  end
  
  return readable_string
end

# 示例使用
input = "Hello, world!"
readable_string = hash_to_readable_string(input)
puts readable_string