Ruby中如何将哈希嵌入数组并遍历这些哈希？

嘿，我来帮你把这段代码理顺并完善，实现创建多个独立参与者哈希、遍历填充数据的需求～

关键注意点先提一嘴 #

直接用Array.new(4, participant)会踩坑——所有数组元素会指向同一个哈希对象，改一个所有都会跟着变！所以得用块来创建每个独立的哈希实例，保证数据互不干扰。

完整可运行代码 #

# 先定义单个参与者的哈希模板，包含需要的所有字段
participant_template = { 
  "participant_name" => "", 
  "cupcakes_sold" => 0, 
  "cakes_sold" => 0, 
  "cupcakes_left" => 0, 
  "cakes_left" => 0 
}

# 创建包含4个独立哈希的数组，每个哈希都是模板的副本
participants = Array.new(4) { participant_template.clone }

# 遍历数组，逐个收集每个参与者的信息
participants.each do |participant|
  puts "\nPlease enter participant name: "
  participant["participant_name"] = gets.chomp

  puts "\nHow many cupcakes did #{participant["participant_name"]} sell? "
  participant["cupcakes_sold"] = gets.chomp.to_i

  puts "\nHow many cakes did #{participant["participant_name"]} sell? "
  participant["cakes_sold"] = gets.chomp.to_i

  puts "\nHow many cupcakes does #{participant["participant_name"]} have left? "
  participant["cupcakes_left"] = gets.chomp.to_i

  puts "\nHow many cakes does #{participant["participant_name"]} have left? "
  participant["cakes_left"] = gets.chomp.to_i
end

# 可选：输出所有参与者的数据，验证是否正确填充
puts "\n--- All Participants Data ---"
participants.each_with_index do |participant, index|
  puts "\nParticipant #{index + 1}:"
  participant.each do |key, value|
    puts "#{key}: #{value}"
  end
end

代码里的小细节解释 #

• participant_template.clone：每次循环都复制一份模板哈希，确保每个参与者的数据是独立的
• gets.chomp.to_i：把用户输入的字符串转成整数，毕竟销售/剩余数量是数值类型，方便后续计算
• each_with_index：遍历输出的时候带上索引，能清晰区分第几个参与者的信息

内容的提问来源于stack exchange，提问作者Chantelle