如何按年份/月份和总和值对ruby文本散列进行分组

require 'date'

# 假设文本散列数组为hashes
hashes = [
  { date: '2022-01-01', sum: 100 },
  { date: '2022-01-15', sum: 200 },
  { date: '2022-02-01', sum: 150 },
  { date: '2022-02-15', sum: 250 }
]

# 创建一个空的哈希表用于存储分组结果
grouped_hashes = {}

# 遍历文本散列数组
hashes.each do |hash|
  # 解析日期信息
  date = Date.parse(hash[:date])
  
  # 提取年份和月份
  year = date.year
  month = date.month
  
  # 创建新的散列用于存储年份、月份和总和值
  new_hash = { year: year, month: month, sum: hash[:sum] }
  
  # 将散列添加到对应的分组中
  grouped_hashes[year] ||= {}
  grouped_hashes[year][month] ||= []
  grouped_hashes[year][month] << new_hash
end

# 输出分组结果
grouped_hashes.each do |year, months|
  puts "Year: #{year}"
  months.each do |month, hashes|
    puts "Month: #{month}"
    hashes.each do |hash|
      puts "Sum: #{hash[:sum]}"
    end
  end
end