如何根據月份中的數字獲取日期名稱

Question

我知道我們可以使用以下代碼獲取星期幾的名稱

 var d = new Date(); var days = ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"]; console.log(days[d.getDay()]); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 

但我需要從當月的3個隨機數中獲取日期的名稱

 var arr = []
 while(arr.length < 3){
   var randomnumber=Math.ceil(Math.random()*30)
   var found=false;
   for(var i=0;i<arr.length;i++){
    if(arr[i]==randomnumber){found=true;break}
  }
   if(!found)arr[arr.length]=randomnumber;
 }

能否讓我知道如何在JS中執行此操作？

Answer 1

您需要做的就是生成一個日期，然后使用.getDay()獲得介於0 Sun to Sat 6之間的一天，即從Sun to Sat

function returnDay(d, m, y){
    var year = y | 2015; // Making y an optional param.
    var d = new Date(m+"/"+d+"/"+y); // Pass inside any date if you have.
    var days = ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"];
    return days[d.getDay()];
}

現在您要做的就是

returnDay(16, 12, 2015); // Will return the day of 12/16/2015 (mm-dd-yy)

您也可以傳遞隨機的日期/月份/年份

Answer 2

如果只需要查找當月任何一天的日期名稱（英文），則可以用一行代碼來完成：

 function getDay( day ) {
      return new Date((new Date()).setDate(day)).toDateString().split(' ').shift();
 }  

 // Test - DEC 2015 returns Tues, Mon, Thu, Fri
 console.info( getDay( 1 ));   
 console.info( getDay( 14 ));  
 console.info( getDay( 24 ));   
 console.info( getDay( 32 ));

Answer 3

你應該喜歡

var d = new Date(),
    n = d.getMonth(),
    y = d.getFullYear();

var days = ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"];
//Create new date from your No and Current Month+Year
var newDate = new Date("YourRandNo" + n + y);    
console.log(days[newDate.getDay();]);

例如 如果Rand No是21則新日期是“ 21-12-2015 ”，您可以找到日期。