如何比较给定时间，落在特定时间范围之间 - javascript答案

【问题标题】：how to compare a given time, falls between a specific time range - javascript如何比较给定时间，落在特定时间范围之间 - javascript
【发布时间】：2018-08-17 06:19:44
【问题描述】：

我正在使用节点 js 为时尚相关的应用程序创建后端，我需要显示特定商店是根据当前时间打开或关闭的。那么，如何比较当前时间与商店的开始和结束时间？任何帮助，将不胜感激。下面给出了存储在db中的时序数据集：

"timings" : [
    {
      "id": 1,
      "day": "Monday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 2,
      "day": "Tuesday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 3,
      "day": "Wednesday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 4,
      "day": "Thursday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 5,
      "day": "Friday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 6,
      "day": "Saturday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    },
    {
      "id": 7,
      "day": "Sunday",
      "session_one": {
        "start_time": "10:00 AM",
        "end_time": "02:00 PM"
      },
      "session_two": {
        "start_time": "04:00 PM",
        "end_time": "09:00 PM"
      },
      "session_three": {
        "start_time": "03:00 PM",
        "end_time": "07:30 PM"
      }
    }
  ]

【问题讨论】：

你的意思是在获取数据之前检查范围？
Mongodb 对此有明确提及看看docs.mongodb.com/manual/reference/operator/aggregation/hour 看看这个stackoverflow.com/questions/11973304/…
是的，在将其发送给客户端之前，我需要检查请求的时间是否介于任何会话时间之间。
是的，完全是@VikasValechha，你必须在服务器端检查它
我看到了这个stackoverflow.com/questions/11973304/…，但在我的情况下，日期存储在字符串中而不是日期对象中，那么我该如何比较它们呢？ @SaikatHajra

标签： javascript node.js

【解决方案1】：

试试这个，

function timeCal(time) {
    let timeSplit = time.split(' ');
    let timeInMinutes = 0;

    if(timeSplit[1] === 'AM') {
        let timeArr = timeSplit[0].split(':');

        let hours = parseInt(timeArr[0]);
        let minutes = parseInt(timeArr[1]); 

        timeInMinutes = (hours === 12) ? minutes : (hours * 60) + minutes;

    } else if(timeSplit[1] === 'PM') {
        let timeArr = timeSplit[0].split(':');

        let hours = parseInt(timeArr[0]);
        let minutes = parseInt(timeArr[1]); 

        timeInMinutes = (hours === 12) ? (hours * 60 + minutes) : ((hours + 12) * 60) + minutes;
    }

    return timeInMinutes;
}


let time =  {
        "start_time": "10:20 AM",
        "end_time": "02:00 PM"
      };

let start = timeCal(time.start_time);
let end = timeCal(time.end_time);
let today = new Date();
let current = today.getHours() * 60 + today.getMinutes();

(start<=current && end>=current) ? console.log('open') : console.log('closed');

【讨论】：