Convert seconds to compound duration: Difference between revisions
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Simple9371 (talk | contribs) |
m (→{{header|Haskell}}: simplified) |
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=={{header|Haskell}}== |
=={{header|Haskell}}== |
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<lang haskell>import Control.Monad (forM_) |
<lang haskell>import Control.Monad (forM_) |
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import Data.List (intercalate) |
import Data.List (intercalate, mapAccumR) |
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import System.Environment (getArgs) |
import System.Environment (getArgs) |
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import Text.Printf (printf) |
import Text.Printf (printf) |
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reduceBy :: Integral a => a -> [a] -> [a] |
reduceBy :: Integral a => a -> [a] -> [a] |
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n `reduceBy` |
n `reduceBy` xs = n' : ys where (n', ys) = mapAccumR quotRem n xs |
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n `reduceBy` (d:ds) = let (q, r) = n `quotRem` d in q : r `reduceBy` ds |
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-- Duration/label pairs. |
-- Duration/label pairs. |
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durLabs :: [(Integer, String)] |
durLabs :: [(Integer, String)] |
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durLabs = [( |
durLabs = [(undefined, "wk"), (7, "d"), (24, "hr"), (60, "min"), (60, "sec")] |
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-- Time broken down into non-zero durations and their labels. |
-- Time broken down into non-zero durations and their labels. |
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compdurs :: Integer -> [(Integer, String)] |
compdurs :: Integer -> [(Integer, String)] |
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compdurs t = let ds = t `reduceBy` |
compdurs t = let ds = t `reduceBy` (map fst $ tail durLabs) |
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in filter ((/=0) . fst) $ zip ds (map snd durLabs) |
in filter ((/=0) . fst) $ zip ds (map snd durLabs) |
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