我怎样才能得到给定日期的星期几？
[英]How can I get the day of the week with date given?
问题描述
I want to get the day of the week (ex: Monday, Tuesday, etc.) with a random given date.
我想得到一个随机给定日期的星期几（例如：星期一、星期二等）。 This is my code:这是我的代码：
function dayOfWeek (date) { var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday']; return day var day = date(i); document.write("get.day(): " + day.getDay()); } var date1 = 11/19/2001; console.log(dayOfWeek(date1)); var date2 =12/19/1969; console.log(dayOfWeek(date2));
2 个解决方案
解决方案1
3 已采纳 2020-06-06 00:19:21
There were quite a few things that were wrong with your code.您的代码有很多问题。
First is that you were incorrectly using a return statement.首先是您错误地使用了 return 语句。 Any code after your return statement in the dayOfWeek function won't be run.您在dayOfWeek function 中的 return 语句之后的任何代码都不会运行。
Also, var date1 = 11/19/2001 is 100% not what you think it is.此外， var date1 = 11/19/2001是 100% 不是您认为的那样。 As it is now, it's two division operations, and not a string or date object.就像现在一样，它是两个除法运算，而不是字符串或日期 object。 Notice in my code there are quotes surrounding the date value.请注意，在我的代码中，日期值周围有引号。
function dayOfWeek (date) { const days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday']; return days[date.getDay()]; } var date1 = new Date('11/19/2001'); console.log(dayOfWeek(date1)); var date2 = new Date('12/19/1969'); console.log(dayOfWeek(date2));
You may want to look into DateTimeFormat and the formatToParts if you plan on allowing for other languages.如果您打算允许其他语言，您可能需要查看DateTimeFormat和formatToParts 。
Hope this helps希望这可以帮助
解决方案2
1 2021-11-14 21:00:18
Your code works fine - But as noted from above, you have syntax errors and are actually using division (math) operators.您的代码工作正常 - 但如上文所述，您有语法错误并且实际上正在使用除法（数学）运算符。
There's an easy way to get the date though.不过，有一种简单的方法可以获取日期。
From a library I built called Date.js - It allows you to get all dates using 1 function.从我构建的一个名为Date.js的库中 - 它允许您使用 1 function 获取所有日期。
Here's a live example of Date.js:这是 Date.js 的一个活生生的例子：
console.log("Current time:", date.js.time()); console.log("Current millisecond:", date.js.millisecond()); console.log("Current second:", date.js.second()); console.log("Current minute:", date.js.minute()); console.log("Current hour:", date.js.hour()); console.log("Current day:", date.js.day()); console.log("Current week:", date.js.week()); console.log("Current month:", date.js.month()); console.log("Current three-letter month:", date.js.tlmonth()); console.log("Current season:", date.js.season());
<:DOCTYPE html> <html> <head> <script type="text/javascript" src="https.//cdn.jsdelivr.net/gh/Parking-Master/Date.js@latest/date.min.js"></script> </head> <body> </body> </html>
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