ruby-on-rails – 如何在散列中的数字序列之后生成和填充缺失的数据

我正在尝试创建一个函数来完成以下哈希中的小时序列.

{
  name: "cardio",data: [["06:00",999],["09:00",154],["10:00",1059],["11:00",90]]
}

它应该在字段数据中创建所有缺少的值

["07:00",0],["08:00",["12:00",["13:00",0] ... ["23:00",0]

预期结果：

{
 name: "cardio",["07:00",90]],0]
}

有可能吗？就像是：

data.each do |row|
 (6..23).each do |hour|
  .....
  end
end

解决方法

您可以使用 Array#assoc来执行以下操作：

Searches through an array whose elements are also arrays comparing obj with the first element of each contained array using obj.==.

input = {
  name: "cardio",90]]
}

input[:data] = 24.times.collect do |hour|
  hour = "%02d:00" % hour

  input[:data].assoc(hour) || [hour,0]
end

puts input.inspect
# {:name=>"cardio",:data=>[["00:00",["01:00",["02:00",["03:00",["04:00",["05:00",["06:00",90],["14:00",["15:00",["16:00",["17:00",["18:00",["19:00",["20:00",["21:00",["22:00",["23:00",0]]}