dayofweek | 易学教程

java.time.LocalDate.getDayOfWeek() to java.util.Calendar.get(DAY_OF_WEEK)

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问题 I am using the recent java.time package and in particular the day of week getter of LocalDate. I get a nice DayOfWeek enum when calling LocalDate.getDayOfWeek() . However, my code should be compatible with some older part of the application that uses the integer value of a Calendar weekday, i.e. obtained from the code Calendar.get(DAY_OF_WEEK) . Obviously, in the DayOfWeek enum, SUNDAY value is 7, and in Calendar DAY_OF_WEEK field, SUNDAY value is 1. So, what choices do I have to convert one

LINQ to Entities Join on DateTime.DayOfWeek

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问题 Imagine two tables: Shifts, RANK_S_DAY. Shifts contains a ShiftDate column which is DateTime and RANK_S_DAY has a DayOfWeek column. I need to join (int)ShiftDate.DayOfWeek equals DayOfWeek . I understand why it won't work, but I'm not quite sure how I can change it. The Exception is: The specified type member 'DayOfWeek' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported. As I understand it, LINQ can't translate (int

LINQ to Entities Join on DateTime.DayOfWeek

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Convert integer to a list of week days

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问题 I have an integer stored in a database (SQLAgent Frequency Interval) This integer is actually the sum of the selected days of the week that the schedule is to run The possible values are any combination of these values Sunday =1 Monday = 2 Tuesday =4 Wednesday= 8 Thursday = 16 Friday = 32 Saturday =64 ex 65 means that the schedule should run on Saturday and Sunday My problem is that I need to represent these values as the text "Saturday" and "Sunday" when given 65 and I am trying to do this

Using the time to retrieve specific content from a database through php

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问题 Am trying to display information on a website based on the local time. Each element has 3 elements. 1. A start time from 01 - 24 2. An end time from 00 - 60 3. A day of the week from Mon - Sun What I want to do is load a specific element from the database, based on the day and time. How do I go about it? Is there any scripts to do this in php/mysql? I've managed to get all the elements from the database to load based on the day, using the script below; <? $day = date('l'); // weekday name

How to write a “which day is it after x days” recursion in Haskell?

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问题 I am starting to learn Haskell and I'm trying to get this code to work but I cannot understand where is my mistake. I would really appreciate it if you could explain it to me. :) I want to type for example Mon 8 and get Tue. data Day = Mon | Tue | Wed | Thu | Fri | Sat | Sun < - [1..7] next :: Day -> Day next Mon = Tue next Tue = Wed next Wed = Thu next Thu = Fri next Fri = Sat next Sat = Sun next Sun = Mon gez n :: (Ord a) => a -> a -> Bool | n > 7 = n - 7 | n <= 7 = n 回答1: You don't have

How do I get count of weekend days from a range of dates

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问题 I have to find out total number of saturday and sunday between Start Date & End Date. Example #1: StartDate = Getdate(), EndDate = GetDate() + 5 -- result should be 2. Example #2: StartDate = Getdate(), EndDate = GetDate() + 10 -- result should be 4. Can anyone suggest please. 回答1: Here it is DECLARE @STARTDATE DATE='01/JAN/2014' DECLARE @ENDDATE DATE='01/MAR/2014' ;WITH CTE as ( SELECT CAST(@STARTDATE AS DATE) as [DAYS] UNION ALL SELECT DATEADD(DAY,1,[DAYS]) [DAYS] FROM CTE WHERE [DAYS] <

How many specific days within a date range in Javascript

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问题 I have two dates. One is starting date and another is ending date. I want to calculate how many Saturdays, Mondays and Wednesdays falls within the date range? How can I solve it? I saw several tutorial but they are only counting the dates within date range. Thanks in advance. I am using the following code to calculate only business days but I need only how many saturdays, mondays and wednesdays falls within the date range. <!DOCTYPE html> <html> <head> <meta charset=utf-8 /> <title>JS Bin<

How to get the 7 days in a week with a currentDate in javascript?

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问题 (first, sorry for my bad english, i'm a beginner) I have a chart of percent by date. I would like to display every day of the current week in the x-axis. So, i tried to find how to get the seven days of the week. that's what i have : var curr = new Date; // get current date var first = curr.getDate() - curr.getDay();//to set first day on monday, not on sunday, first+1 : var firstday = (new Date(curr.setDate(first+1))).toString(); for(var i = 1;i<7;i++){ var next = first + i; var nextday =

How to get the Date of the first day of a week given a time stamp in Hadoop Hive?

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问题 Besides writing a custom UDF to support this issue, is there any known methods of achieving this? I'm currently using Hive 0.13. 回答1: date_sub(m.invitationdate,pmod(datediff(m.invitationdate,'1900-01-07'),7)) This expression gives the exact solution to my question. Regards, Boris 回答2: This is the easiest and the best solution for fetching 1st day of the week's date: For Current timstamp: select date_sub(from_unixtime(unix_timestamp()), cast(from_unixtime(unix_timestamp(), 'u') AS int)) ; For