GetLocalday从Day到number-Java 学习之路

我的学校命令是这样的：

下面的函数（包括getLocalDay Advocate Written）以整数形式返回星期几 .

这是0周日，周一1，周二2等 .

在一些国家（包括荷兰）是周一的第一天 . 确保这个函数是周一，周二，周三，周四，周五，周六和周日如何工作，因为整数分别为0到6 . 因此0 =星期一/星期二= 1/2 =星期二/星期四= 3/4 =星期五/ 5 =星期六/星期日6 =

我懂了

function getLocalDay(date) {
  var day = date.getDay();

    var weekday=new Array(7);
    weekday[0]="Monday";
    weekday[1]="Tuesday";
    weekday[2]="Wednesday";
    weekday[3]="Thursday";
    weekday[4]="Friday";
    weekday[5]="Saturday";
    weekday[6]="Sunday";
    console.log("Today is " + weekday[3]);
    var d=new Date();
    console.log(d.getDay());
}

但我想从那天返回数字.....

2 回答

您需要将我们的解决方案合并到您自己页面上的代码中 . 在这里，我将显示一个包含 span 的示例 Headers ，该 Headers 将使用日期编号进行更新 .

window.addEventListener("DOMContentLoaded", function(){
 
  // Get a reference to the <span> element on the page
  var label = document.getElementById("day");
  
  // Inject the answer from the function into it:
  label.textContent = getLocalDay(new Date());
  
});

function getLocalDay(date) {
  var day = date.getDay();

  var weekdays = ["Monday","Tuesday" ,"Wednesday" ,
                  "Thursday" ,"Friday" ,"Saturday" ,"Sunday" ];
    
  let dayNum = null;
  weekdays.forEach(function(d, index, arry){

    if(d === weekdays[day - 1]){
      dayNum = index;
    }
  });
    
  return dayNum;
}

<h1>The day number for today is: <span id="day"></span></h1>

回复于 2024-05-05T21:42:21+08:00

它应该是

function getLocalDay(date) {
  var dayIndex = date.getDay();
  var daysInWeek = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

  return daysInWeek[dayIndex];
}

ES6语法

const getLocalDay = (date) => {
  const dayIndex = date.getDay();
  const daysInWeek = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

  return daysInWeek[dayIndex];
}

回复于 2024-05-05T21:42:21+08:00

GetLocalday从Day到number

2 回答

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