This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import Data.Time | |
import System.Locale | |
dayAndTime :: ZonedTime -> (Day, TimeOfDay) | |
dayAndTime zt = let lt = zonedTimeToLocalTime zt | |
day = localDay lt | |
time = localTimeOfDay lt | |
in (day, time) | |
day = fst . dayAndTime | |
time = snd . dayAndTime | |
diffTime :: TimeOfDay -> TimeOfDay -> TimeOfDay | |
diffTime t1 t2 = timeToTimeOfDay | |
(timeOfDayToTime t2 - timeOfDayToTime t1) | |
main = do | |
-- Day 型の値の生成 | |
print $ fromGregorian 2010 4 1 | |
-- 2010.4.1 の 100 日後は? | |
print $ addDays 100 $ fromGregorian 2010 4 1 | |
-- 2010.4.1 から大晦日までは何日? | |
print $ fromGregorian 2010 12 31 `diffDays` fromGregorian 2010 4 1 | |
-- 現在の時刻を取得 | |
now <- getZonedTime | |
-- 現在の日付から 100 日後は? | |
print $ addDays 100 (day now) | |
-- 現在から大晦日までは何日? | |
print $ fromGregorian 2010 12 31 `diffDays` (day now) | |
-- 後何分? | |
print $ diffTime (time now) (TimeOfDay 22 0 0) | |
-- フォーマット | |
print $ formatTime defaultTimeLocale "%Y--%m--%d" | |
$ fromGregorian 2010 4 1 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment