Unix tools/Date: Difference between revisions
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Example use of the System.Time library. | |||
<haskell> | |||
-- | |||
-- Implement the unix 'date' command in Haskell | |||
-- | |||
import System.IO | |||
import System.Time | |||
import System.Locale | |||
import System.Environment | |||
main = do | |||
[s] <- getArgs | |||
time <- getClockTime >>= toCalendarTime | |||
putStrLn $ formatCalendarTime defaultTimeLocale s time | |||
</haskell> | |||
Running this code: | |||
<haskell> | |||
$ ghc -O A.hs | |||
$ ./a.out "%a %b %e %H:%M:%S %Z %Y" | |||
Thu Dec 14 12:09:02 EST 2006 | |||
$ ./a.out "%y-%m-%d" | |||
06-12-14 | |||
</haskell> | |||
[[Category:Code]] | |||
[[Category:Tutorials]] | |||
Latest revision as of 15:19, 6 February 2021
Example use of the System.Time library.
--
-- Implement the unix 'date' command in Haskell
--
import System.IO
import System.Time
import System.Locale
import System.Environment
main = do
[s] <- getArgs
time <- getClockTime >>= toCalendarTime
putStrLn $ formatCalendarTime defaultTimeLocale s timeRunning this code:
$ ghc -O A.hs
$ ./a.out "%a %b %e %H:%M:%S %Z %Y"
Thu Dec 14 12:09:02 EST 2006
$ ./a.out "%y-%m-%d"
06-12-14