datetime-comparison | 易学教程

Check if the time is within the min and max range

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问题 I don't know what's happening here: I need to return true if the current time is between a given range, ex: now is 15:45:00 and is between 12:00:00(min) and 18:00:00(max), but this method is doing it wrong: private boolean verifyIfInside(String max, String min){ try { DateFormat dateFormat = new SimpleDateFormat ("HH:mm:ss"); Date date = new Date(); String hour1 = min; String hour2 = max; String newHour = dateFormat.format(date); Date minHour, maxHour, nowHour; minHour = dateFormat.parse

Google Spreadsheet comparison using TIME function for 10:40:00 fails

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问题 I'm having a problem when comparing cells with value 10:40:00 to the result of the spreadsheet function TIME(10,40,0) A series of comparisons shows that values from 8:40 to 10:39:59 and from 10:40:01 to 13:40:00 compare correctly but 10:40:00 incorrectly returns FALSE for the comparison. Am I missing something or is this a bug? 回答1: I've played around with your spreadsheet and I think I've found the reason. This has got to be a bug (or at least an inconsistency in reading time literals). Take

How do I perform date-part comparison in EF

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问题 i heard people saying date time comparison do not work just due to time part because datetime has time part. in sql i always compare datetime like this way and it works fine select * from employee where convert(varchar,dob,112) > '20111201' // this yyyymmdd format. how could i simulate this in a LINQ query? 回答1: The one thing to keep in mind is that operations on DateTime structs that represent database columns don't translate to SQL. So, you cannot write a query like: from e in

How to check given time is after 3pm or not in Rails?

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问题 I want easiest or simplest method which returns me boolean value (true/false) depending on the given time is after 3 pm or not irrespective of date. for ex:- def after_three_pm(time) //some code here end time= Time.now # Tue Jul 26 11:17:27 +0530 2011 THEN after_three_pm(time) # should return false time= Time.now # Tue Jul 26 15:17:27 +0530 2011 THEN after_three_pm(time) # should return true 回答1: def after_three_pm(time) time.hour >= 15 end is all you need. 回答2: you simply need to use the

How do I perform Date Comparison in EF query?

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问题 Please help. I am trying to figure out how to use DATE or DATETIME for comparison in a linq query. Example: If I wanted all Employee names for those who started before today, I would do something like this in SQL: SELECT EmployeeNameColumn FROM EmployeeTable WHERE StartDateColumn.Date <= GETDATE() //Today But what about linq? DateTime startDT = //Today var EmployeeName = from e in db.employee where e.StartDateColumn <= startDT The above WHERE doesn't work: Exception Details: System

How do I perform Date Comparison in EF query?

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Compare and filter data with date in MM/DD/YYYY format from current date using using new Date() while subtracting new Date() from user input value

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问题 Trying to compare the new Date(today's date) in 2015-02-21T21:48:48.137Z format with date in MM/DD/YYYY format which is my json data. I would like to filter all the data before today's days based on user input based on number of day's user enters(getting data before no certain number of days)..I can get the number of days and subtract it from todays date. Don't know how to compare this date with Json date value in MM/DD/YYYY format.Should i parse the Date() in order to compare with JSON data

How to make an if statement to show xml attribute based on current time

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问题 I have a XML like this: <PrayerTime Day ="1" Month="5" Fajr="07:00" Sunrise="09:00" Zuhr="14:00" /> A class like this: public class PrayerTime { public string Fajr { get; set; } public string Sunrise { get; set; } public string Zuhr { get; set; } } And something to get the value like this: XDocument loadedCustomData = XDocument.Load("WimPrayerTime.xml"); var filteredData = from c in loadedCustomData.Descendants("PrayerTime") where c.Attribute("Day").Value == myDay.Day.ToString() && c

Checking if LocalDateTime falls within a time range

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问题 I have a time A which should fall within 90 minutes range of timeB (before and after). Example: if timeB is 4:00 pm , time A should be between 2:30pm (-90) to 5:30pm (+90) Tried the following : if(timeA.isAfter(timeB.minusMinutes(90)) || timeA.isBefore(timeB.plusMinutes(90))) { return isInRange; } Can you help me whats wrong with the logic here? 回答1: As @JB Nizet said in the comments, you're using the OR operator ( || ). So you're testing if A is after B - 90 OR A is before B + 90 . If only

Checking if LocalDateTime falls within a time range

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I have a time A which should fall within 90 minutes range of timeB (before and after). Example: if timeB is 4:00 pm , time A should be between 2:30pm (-90) to 5:30pm (+90) Tried the following : if(timeA.isAfter(timeB.minusMinutes(90)) || timeA.isBefore(timeB.plusMinutes(90))) { return isInRange; } Can you help me whats wrong with the logic here? As @JB Nizet said in the comments , you're using the OR operator ( || ). So you're testing if A is after B - 90 OR A is before B + 90 . If only one of the conditions is satisfied, it returns true . To check if A is in the range, both conditions must be