如何获得一个月内的天数，不包括周末 [英] How to get number of days in a month excluding weekends

问题描述

我写了一个功能，给我一个月的所有日子，不包括周末。一切正常，但是当我想要12月的时候，Date对象返回下周的01月1日，该函数返回一个空数组。

I have written a function to give me all days of a month excluding weekends. Every thing works fine but when I want to get December days the Date object returns 01 Jan of next week and the function returns an empty array.

请帮助。

function getDaysInMonth(month, year) {
    var date = new Date(year, month-1, 1);
    var days = [];
    while (date.getMonth() === month) {

        // Exclude weekends
        var tmpDate = new Date(date);            
        var weekDay = tmpDate.getDay(); // week day
        var day = tmpDate.getDate(); // day

        if (weekDay !== 1 && weekDay !== 2) {
            days.push(day);
        }

        date.setDate(date.getDate() + 1);
    }

    return days;
}  

alert(getDaysInMonth(month, year))

推荐答案

当您创建日期时，您使用月份= 0到11

When you create a date, you use month = 0 to 11

当您获得月份时，这也是适用的 - 它也会返回0到11

This also goes for when you GET the month - it also returns 0 to 11

我很惊讶你说

每件事工作正常

Every thing works fine

它实际上从来没有工作过任何月份 - 总是会返回一个空数组

It actually never worked for any month - always would return an empty array

function getDaysInMonth(month, year) {
    month--; // lets fix the month once, here and be done with it
    var date = new Date(year, month, 1);
    var days = [];
    while (date.getMonth() === month) {

        // Exclude weekends
        var tmpDate = new Date(date);            
        var weekDay = tmpDate.getDay(); // week day
        var day = tmpDate.getDate(); // day

        if (weekDay%6) { // exclude 0=Sunday and 6=Saturday
            days.push(day);
        }

        date.setDate(date.getDate() + 1);
    }

    return days;
}  

alert(getDaysInMonth(month, year))

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