选择依据作为二维哈希

Question

我有这个哈希

- "title" : "The Today Show",
- "category; "Show",
- "channel-name": "CNBC",
- "scheduling" => 
       { "start" : "7am", "stop" : "9am"},
       { "start" : "10am", "stop" : "11am"},
       { "start" : "11am", "stop": "12am"}
- "title" : "How I met your mother",
- "category; "Show",
- "channel-name": "CBS",
- "scheduling" => 
       { "start" : "7pm", "stop" : "9pm"},
       { "start" : "10pm", "stop" : "12pm"},
       { "start" : "11am", "stop": "12am"}

我只需要"选择"至少有一个时间表"晚上 7 点"到"晚上 9 点"

的程序

我试过这个，但它不起作用

programs.select_by{|p| 
      p.scheduling.each{|ps|
         ps.start <= "7pm" && ps.stop <= "9pm"
   }
}

PS：我使用伪代码进行日期比较只是为了使此代码更具可读性:)

Answer 1

试试这个

programs.select do |p| 
  p.scheduling.any? do |ps|
    ps.start >= "7pm" && ps.stop <= "9pm"
  end
end