Date format
You are encouraged to solve this task according to the task description, using any language you may know.
Display the current date in the formats of "2007-11-10" and "Sunday, November 10, 2007".
Ada
<Ada> with Ada.Calendar; use Ada.Calendar; with Ada.Calendar.Formatting; use Ada.Calendar.Formatting; with Ada.Text_IO; use Ada.Text_IO;
procedure Date_Format is
function Image (Month : Month_Number) return String is begin case Month is when 1 => return "January"; when 2 => return "February"; when 3 => return "March"; when 4 => return "April"; when 5 => return "May"; when 6 => return "June"; when 7 => return "July"; when 8 => return "August"; when 9 => return "September"; when 10 => return "October"; when 11 => return "November"; when 12 => return "December"; end case; end Image; function Image (Day : Day_Name) return String is begin case Day is when Monday => return "Monday"; when Tuesday => return "Tuesday"; when Wednesday => return "Wednesday"; when Thursday => return "Thursday"; when Friday => return "Friday"; when Saturday => return "Saturday"; when Sunday => return "Sunday"; end case; end Image; Today : Time := Clock;
begin
Put_Line (Image (Today) (1..10)); Put_Line ( Image (Day_Of_Week (Today)) & ", " & Image (Ada.Calendar.Month (Today)) & Day_Number'Image (Ada.Calendar.Day (Today)) & "," & Year_Number'Image (Ada.Calendar.Year (Today)) );
end Date_Format; </Ada> Sample output:
2008-10-03 Friday, October 3, 2008
C
<C>
- include <stdio.h>
- include <stdlib.h>
- include <time.h>
int main() {
time_t seconds; struct tm *now; seconds = time(NULL); now = localtime(&seconds); printf("%d-%d-%d\n", now->tm_year + 1900, now->tm_mon + 1, now->tm_mday); char *months[] = {"January","February","March","April","May","June","July","August","September","October","November","December"}; char *days[] = {"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; printf("%s, %s %d, %d\n",days[now->tm_wday], months[now->tm_mon], now->tm_mday, now->tm_year + 1900);
/* shortcut for default format */ printf("%s", ctime(&seconds));
return 0;
} </C> Sample output:
2008-10-7 Tuesday, October 7, 2008 Tue Oct 7 16:51:40 2008
C#
<csharp> using System;
namespace RosettaCode.DateFormat {
class Program { static void Main(string[] args) { DateTime today = DateTime.Now.Date; Console.WriteLine(today.ToString("yyyy-MM-dd")); Console.WriteLine(today.ToString("dddd, MMMMM d, yyyy")); } }
} </csharp>
ColdFusion
<cfset date = createDate( 2007, 11, 10 ) /> #dateFormat( date, "YYYY-MM-DD" )#, #dateFormat( date, "DDDD, MMMM DD, YYYY" )#
D
<d>module datetimedemo ;
import tango.time.Time ; import tango.text.locale.Locale ; import tango.time.chrono.Gregorian ;
import tango.io.Stdout ;
void main() {
Gregorian g = new Gregorian ; Stdout.layout = new Locale; // enable Stdout to handle date/time format Time d = g.toTime(2007, 11, 10, 0, 0, 0, 0, g.AD_ERA) ; Stdout.format("{:yyy-MM-dd}", d).newline ; Stdout.format("{:dddd, MMMM d, yyy}", d).newline ; d = g.toTime(2008, 2, 1, 0, 0, 0, 0, g.AD_ERA) ; Stdout.format("{:dddd, MMMM d, yyy}", d).newline ;
}</d> Sample Output:
2007-11-10 Saturday, November 10, 2007 Friday, February 1, 2008
Forth
: str-table create ( n -- ) 0 do , loop does> ( n -- str len ) swap cells + @ count ; here ," December" here ," November" here ," October" here ," September" here ," August" here ," July" here ," June" here ," May" here ," April" here ," March" here ," February" here ," January" 12 str-table months here ," Sunday" here ," Saturday" here ," Friday" here ," Thursday" here ," Wednesday" here ," Tuesday" here ," Monday" 7 str-table weekdays \ Zeller's Congruence : zeller ( m -- days since March 1 ) 9 + 12 mod 1- 26 10 */ 3 + ; : weekday ( d m y -- 0..6 ) \ Monday..Sunday over 3 < if 1- then dup 4 / over 100 / - over 400 / + + swap zeller + + 1+ 7 mod ; : 3dup dup 2over rot ; : .long-date time&date ( s m h D M Y ) 3dup weekday weekdays type ." , " >R 1- months type space 1 u.r ." , " R> . drop drop drop ;
: .-0 ( n -- n ) [char] - emit dup 10 < if [char] 0 emit then ; : .short-date time&date 1 u.r .-0 1 u.r .-0 1 u.r drop drop drop ;
Fortran
The subroutine DATE_AND_TIME does not return day of week information so we have to write our own function for that
PROGRAM DATE IMPLICIT NONE INTEGER :: dateinfo(8), day CHARACTER(9) :: month, dayname CALL DATE_AND_TIME(VALUES=dateinfo) SELECT CASE(dateinfo(2)) CASE(1) month = "January" CASE(2) month = "February" CASE(3) month = "March" CASE(4) month = "April" CASE(5) month = "May" CASE(6) month = "June" CASE(7) month = "July" CASE(8) month = "August" CASE(9) month = "September" CASE(10) month = "October" CASE(11) month = "November" CASE(12) month = "December" END SELECT day = Day_of_week(dateinfo(3), dateinfo(2), dateinfo(1)) SELECT CASE(day) CASE(0) dayname = "Saturday" CASE(1) dayname = "Sunday" CASE(2) dayname = "Monday" CASE(3) dayname = "Tuesday" CASE(4) dayname = "Wednesday" CASE(5) dayname = "Thursday" CASE(6) dayname = "Friday" END SELECT WRITE(*,"(I0,A,I0,A,I0)") dateinfo(1),"-", dateinfo(2),"-", dateinfo(3) WRITE(*,"(4(A),I0,A,I0)") trim(dayname), ", ", trim(month), " ", dateinfo(3), ", ", dateinfo(1) CONTAINS FUNCTION Day_of_week(d, m, y) INTEGER :: Day_of_week, j, k INTEGER, INTENT(IN) :: d, m, y j = y / 100 k = MOD(y, 100) Day_of_week = MOD(d + (m+1)*26/10 + k + k/4 + j/4 + 5*j, 7) END FUNCTION Day_of_week END PROGRAM DATE
Output
2008-12-14 Sunday, December 14, 2008
Haskell
import System.Locale import System.Time format1 :: CalendarTime -> String format1 = formatCalendarTime defaultTimeLocale "%Y-%m-%e" format2 :: CalendarTime -> String format2 = formatCalendarTime defaultTimeLocale "%A, %B %d, %Y" main = do t <- getClockTime >>= toCalendarTime mapM_ putStrLn [format1 t, format2 t]
J
dayNm =: ;:'Sunday Monday Tuesday Wednesday Thursday Friday Saturday' monthNm=: ;:'0 January February March April May June July August September October November December' dateFormat=: 3 : 0 0 dateFormat y NB. default to short format : 'year month date'=. 3{. y select. x case. 0 do. NB. short format YYYY-MM-DD, e.g. '1900-02-28' dashNN=. (('-0' {.~ (3-#)) ,])@ ": (":year),(dashNN month),(dashNN date) case. 1 do. NB. verbose format, e.g. 'Wednesday, February 28, 1900' Y=. year - A =. <. 12%~ 14-month M=. <.12%~31*(month+12*A)-2 D=. 7| date+M+Y+(<.Y%4)+(<.Y%400)-(<.Y%100) (>D{dayNm), ', ',(>month{monthNm),' ',(":date), ', ', ":year end. )
Example:
(dateFormat ,: 1& dateFormat) 1920 12 17 1920-12-17 Friday, December 17, 1920
Java
<java>import java.util.Calendar; import java.util.GregorianCalendar; import java.text.DateFormatSymbols; import java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Dates{ public static void main(String[] args){ Calendar now = new GregorianCalendar(); //months are 0 indexed, dates are 1 indexed DateFormatSymbols symbols = new DateFormatSymbols(); //names for our months and weekdays
//plain numbers way System.out.println(now.get(Calendar.YEAR) + "-" + (now.get(Calendar.MONTH) + 1) + "-" + now.get(Calendar.DATE));
//words way System.out.print(symbols.getWeekdays()[now.get(Calendar.DAY_OF_WEEK)] + ", "); System.out.print(symbols.getMonths()[now.get(Calendar.MONTH)] + " "); System.out.println(now.get(Calendar.DATE) + ", " + now.get(Calendar.YEAR));
//using DateFormat Date date = new Date(); DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd"); System.out.println(format1.format(date)); DateFormat format2 = new SimpleDateFormat("EEEE, MMMM dd, yyyy"); System.out.println(format2.format(date)); } }</java>
OCaml
<ocaml># #load "unix.cma";;
- open Unix;;
- let t = time() ;;
val t : float = 1219997516.
- let gmt = gmtime t ;;
val gmt : Unix.tm =
{tm_sec = 56; tm_min = 11; tm_hour = 8; tm_mday = 29; tm_mon = 7; tm_year = 108; tm_wday = 5; tm_yday = 241; tm_isdst = false}
- Printf.sprintf "%d-%02d-%02d" (1900 + gmt.tm_year) (1 + gmt.tm_mon) gmt.tm_mday ;;
- : string = "2008-08-29"</ocaml>
<ocaml>let months = [| "January"; "February"; "March"; "April"; "May"; "June";
"July"; "August"; "September"; "October"; "November"; "December" |]
let days = [| "Sunday"; "Monday"; "Tuesday"; (* Sunday is 0 *)
"Wednesday"; "Thursday"; "Friday"; "Saturday" |]
- Printf.sprintf "%s, %s %d, %d"
days.(gmt.tm_wday) months.(gmt.tm_mon) gmt.tm_mday (1900 + gmt.tm_year) ;;
- : string = "Friday, August 29, 2008"</ocaml>
Perl
<perl>use POSIX;
print POSIX::strftime('%Y-%m-%d', 0, 0, 0, 10, 10, 107), "\n"; print POSIX::strftime('%A, %B %d, %Y', 0, 0, 0, 10, 10, 107), "\n";</perl>
Output with locales C:
2007-11-10 Saturday, November 10, 2007
Output with locales cs_CZ.UTF-8:
2007-11-10 Sobota, listopad 10, 2007
Actual date: <perl>use POSIX;
print POSIX::strftime('%Y-%m-%d', localtime), "\n"; print POSIX::strftime('%A, %B %d, %Y', localtime), "\n";</perl>
Output with locales C:
2008-02-13 Wednesday, February 13, 2008
PHP
Formatting rules: http://www.php.net/date <php><?php echo date('Y-m-d', time())."\n"; echo date('l, F j, Y', time())."\n"; ?></php>
Python
Formatting rules: http://docs.python.org/lib/module-time.html (strftime)
<python>import datetime today = datetime.date.today()
- This one is built in:
print today.isoformat()
- Or use a format string for full flexibility:
print today.strftime('%Y-%m-%d')</python>
Ruby
Formatting rules: http://www.ruby-doc.org/core/classes/Time.html#M000297 (strftime)
puts Time.now puts Time.now.strftime('%Y-%m-%d') puts Time.now.strftime('%A, %B %d, %Y') Output:
Wed Feb 13 14:24:38 -0800 2008 2008-02-13 Wednesday, February 13, 2008
Raven
time int as today
Short form:
today '%Y-%m-%d' date
Long form:
today '%A, %B %d, %Y' date
UNIX Shell
date +"%Y-%m-%d" date +"%A, %B %d, %Y"