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]]

Revision as of 14:29, 6 February 2021

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