如何通过js获得一个月的4个星期一？ [英] How to get the 4 monday of a month with js?

问题描述

（首先，请原谅我的英文，我是初学者）

让我解释一下情况：

我想使用Google图表工具创建图表（尝试一下，这非常有用）。
这部分不是很难...

问题出现在我有一个特定的图表要求在x轴一个月的四个星期：我想在屏幕上只显示今天的四个星期。

我已经拥有currentMonth和currentYear变量，我知道如何获得第一天的月份。所有我需要的是如何获得一个月的四个星期，在一个阵列。所有这一切都在同一个JavaScript文件中。

我在编程逻辑中很迷失，我看到很多解决方案不适合我的情况。 / p>

所以，我有什么是：

  var date = new日期（）; 
 var currentYear = date.getFullYear（）; 
 var currentMonth = date.getMonth（）; 
 var firstDayofMonth = new Date（currentYear，currentMonth，1）; 
 var firstWeekDay = firstDayofMonth.getDay（）; 
  

我想要这样：

  var myDates = 
 [new Date（firstMonday），new Date（secondMonday），new Date（thirdMonday），new Date（FourthMonday）] 
  

感谢您阅读，如果可以帮助我...：）

Gaelle

解决方案

以下函数将返回所有当月的星期一：

  function getMondays（）{
 var d = new Date（），
 month = d.getMonth（），
 mondays = []; 
 
 d.setDate（1）; 
 
 //获取本月的第一个星期一
 while（d.getDay（）！== 1）{
 d.setDate（d.getDate（）+ 1） ; 
} 
 
 //获取月中所有其他星期一
 while（d.getMonth（）===月）{
 mondays.push（new Date （d.getTime（）））; 
 d.setDate（d.getDate（）+ 7）; 
} 
 
返回星期一; 
} 
  

(first of all, excuse my english, i'm a beginner)

let me explain the situation :

I would like to create charts using Google Charts Tool (give it a try, it's very helpful). This part is not really difficult...

The problem comes when i have a specific chart requiring in the x-axis the four weeks of a month : i would like to display on the screen only the four mondays in the currentmonth.

I already have got the currentMonth and the currentYear variables and i know how to get the first day of the month. all i need is how to get the four mondays of a month, in an array. And all of this in the same JavaScript file.

I'm pretty lost within my programming logic, and i've seen plenty of solutions wich fit not my case.

so, what do i have is :

var date = new Date();
var currentYear = date.getFullYear();
var currentMonth = date.getMonth();
var firstDayofMonth = new Date(currentYear,currentMonth,1);
var firstWeekDay = firstDayofMonth.getDay();

and i would like to have something like this :

var myDates =
[new Date(firstMonday),new Date(secondMonday), new Date(thirdMonday),new Date(fourthMonday)]

Thank you for reading, and if you could help me... :)

Gaelle

解决方案

The following function will return all Mondays for the current month:

function getMondays() {
    var d = new Date(),
        month = d.getMonth(),
        mondays = [];

    d.setDate(1);

    // Get the first Monday in the month
    while (d.getDay() !== 1) {
        d.setDate(d.getDate() + 1);
    }

    // Get all the other Mondays in the month
    while (d.getMonth() === month) {
        mondays.push(new Date(d.getTime()));
        d.setDate(d.getDate() + 7);
    }

    return mondays;
}

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