我还在学习Haskell,我想知道是否有一种不那么冗长的方式来用一行代码来表达下面的语句:
map (\x -> (x, (if mod x 3 == 0 then "fizz" else "") ++
if mod x 5 == 0 then "buzz" else "")) [1..100]产品:[(1,""),(2,""),(3,"fizz"),(4,""),(5,"buzz"),(6,"fizz"),(7,""),(8,""),(9,"fizz"),(10,"buzz"),(11,""),(12,"fizz"),(13,""),(14,""),(15,"fizzbuzz"),(16,""),(17,""),(18,"fizz"),(19,""),(20,"buzz"),(21,"fizz"),(22,""),(23,""),(24,"fizz"),(25,"buzz"),(26,""),(27,"fizz"),(28,""),(29,""),(30,"fizzbuzz")等
我只是觉得我对语法的抗争比我应该做的更多。我已经在Haskell中看到了关于这一点的其他问题,但我正在寻找在一条语句中表达这一点的最优方式(试图理解如何更好地使用语法)。
发布于 2012-01-29 04:10:07
如果你坚持使用一行代码:
[(x, concat $ ["fizz" | mod x 3 == 0] ++ ["buzz" | mod x 5 == 0]) | x <- [1..100]]发布于 2012-01-29 21:01:25
我们不需要恶臭的mod..。
zip [1..100] $ zipWith (++) (cycle ["","","fizz"]) (cycle ["","","","","buzz"])或者稍微短一点
import Data.Function(on)
zip [1..100] $ (zipWith (++) `on` cycle) ["","","fizz"] ["","","","","buzz"]或者使用暴力的方式:
zip [1..100] $ cycle ["","","fizz","","buzz","fizz","","","fizz","buzz","","fizz","","","fizzbuzz"]发布于 2012-01-29 03:23:30
不如..。
fizzBuzz = [(x, fizz x ++ buzz x) | x <- [1..100]]
where fizz n | n `mod` 3 == 0 = "fizz"
| otherwise = ""
buzz n | n `mod` 5 == 0 = "buzz"
| otherwise = ""https://stackoverflow.com/questions/9047775
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