date

问题 Is it possible to store and display the date of when my project was compiled? I'd like to print this date when the program starts in order to know which version is used. Currently, I am doing this by hand, which is rather cumbersome. I am using Visual Studio 2010. 回答1: You can use the __DATE__ and __TIME__ macros - see "Predefined macros" here. As a sample, something like this: #include <iostream> int main() { using namespace std; cout << "Compiled on: " << __DATE__ << endl; cout << "Compiled

问题 I convert date to a string this way: d.Format("Mon 02. Jan") and I get something like Fri 27. Jan How can I switch the locale and get the string in other language? 回答1: You can't. The Go standard library does not contain localized month, day and zone names. The names are wired into the time package. For example, the name of the months returned by Month.String() are stored in the unexported time.month global variable: var months = [...]string{ "January", "February", "March", "April", "May",

问题 I convert date to a string this way: d.Format("Mon 02. Jan") and I get something like Fri 27. Jan How can I switch the locale and get the string in other language? 回答1: You can't. The Go standard library does not contain localized month, day and zone names. The names are wired into the time package. For example, the name of the months returned by Month.String() are stored in the unexported time.month global variable: var months = [...]string{ "January", "February", "March", "April", "May",

问题 I convert date to a string this way: d.Format("Mon 02. Jan") and I get something like Fri 27. Jan How can I switch the locale and get the string in other language? 回答1: You can't. The Go standard library does not contain localized month, day and zone names. The names are wired into the time package. For example, the name of the months returned by Month.String() are stored in the unexported time.month global variable: var months = [...]string{ "January", "February", "March", "April", "May",

问题 I convert date to a string this way: d.Format("Mon 02. Jan") and I get something like Fri 27. Jan How can I switch the locale and get the string in other language? 回答1: You can't. The Go standard library does not contain localized month, day and zone names. The names are wired into the time package. For example, the name of the months returned by Month.String() are stored in the unexported time.month global variable: var months = [...]string{ "January", "February", "March", "April", "May",

问题 I have one record per ID with start date and end date id age state start_date end_date 123 18 CA 2/17/2019 5/4/2019 223 24 AZ 1/17/2019 3/4/2019 I want to create a record for each day between the start and end day, so I can join daily activity data to it. The target output would look something like this id age state start_date 123 18 CA 2/17/2019 123 18 CA 2/18/2019 123 18 CA 2/19/2019 123 18 CA 2/20/2019 123 18 CA 2/21/2019 … 123 18 CA 5/2/2019 123 18 CA 5/3/2019 123 18 CA 5/4/2019 And of

问题 I'm trying to set HOUR_OF_DAY field and change Timezone of the GregorianCalendar date object. GregorianCalendar date = new GregorianCalendar(TimeZone.getTimeZone("GMT+10")); System.out.println("HOUR: " + date.get(Calendar.HOUR_OF_DAY)); date.set(Calendar.HOUR_OF_DAY, 23); //date.get(Calendar.HOUR_OF_DAY); date.setTimeZone(TimeZone.getTimeZone("GMT")); System.out.println("HOUR: " + date.get(Calendar.HOUR_OF_DAY)); Output: HOUR: 16 HOUR: 23 For some reason value of HOUR_OF_DAY does not change

问题 I'm trying to set HOUR_OF_DAY field and change Timezone of the GregorianCalendar date object. GregorianCalendar date = new GregorianCalendar(TimeZone.getTimeZone("GMT+10")); System.out.println("HOUR: " + date.get(Calendar.HOUR_OF_DAY)); date.set(Calendar.HOUR_OF_DAY, 23); //date.get(Calendar.HOUR_OF_DAY); date.setTimeZone(TimeZone.getTimeZone("GMT")); System.out.println("HOUR: " + date.get(Calendar.HOUR_OF_DAY)); Output: HOUR: 16 HOUR: 23 For some reason value of HOUR_OF_DAY does not change

问题 This structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. Reference: http://msdn.microsoft.com/en-us/library/aa915351 Why it is set "since 1601"? Why not unix time 1970 or even 2000? What can I do with the compatibility of so distant in time dates? Answering to myself. The ANSI Date defines January 1, 1601 as day 1, and is used as the origin of COBOL integer dates. This epoch is the beginning of the previous 400-year cycle of leap years in the

问题 This structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. Reference: http://msdn.microsoft.com/en-us/library/aa915351 Why it is set "since 1601"? Why not unix time 1970 or even 2000? What can I do with the compatibility of so distant in time dates? Answering to myself. The ANSI Date defines January 1, 1601 as day 1, and is used as the origin of COBOL integer dates. This epoch is the beginning of the previous 400-year cycle of leap years in the