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Haskell One-liners

**One-liners**
- May 27th, 2018:

data F = F { a, b, c :: String }

data Stamped a = { time :: Day, stamped :: a }

f :: Stamped F -> String

output of f x is "time a b c" for the respective values of time, a, b, c

Is there some monadic / applicative elegant definition that does this?
- Nickolay Kudasov @crazy_fizruk

f = intercalate “ “ . sequence [ show.time, a.stamped, b.stamped, c.stamped ]
- Nickolay Kudasov @crazy_fizruk

f = intercalate " " <$> http://pure.show .time <> (sequence [a, b, c]).stamped

A bit trickier, but shorter and uses stamped once.

- April 13th, 2018: given f :: [a] -> b -> [c]

where c is a derived from g :: a -> b -> c

You have [a] and [b]

Write a function h :: [a] -> [b] -> [c] from f

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