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社区首页 >问答首页 >FizzBuzz清理

FizzBuzz清理
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Stack Overflow用户
提问于 2012-01-29 03:10:57
回答 8查看 706关注 0票数 7

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:

代码语言:javascript
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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")

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)。

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回答 8

Stack Overflow用户

回答已采纳

发布于 2012-01-29 04:10:07

如果你坚持使用一行代码:

代码语言:javascript
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[(x, concat $ ["fizz" | mod x 3 == 0] ++ ["buzz" | mod x 5 == 0]) | x <- [1..100]]
票数 7
EN

Stack Overflow用户

发布于 2012-01-29 21:01:25

我们不需要恶臭的mod..。

代码语言:javascript
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zip [1..100] $ zipWith (++) (cycle ["","","fizz"]) (cycle ["","","","","buzz"])

或者稍微短一点

代码语言:javascript
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import Data.Function(on)

zip [1..100] $ (zipWith (++) `on` cycle) ["","","fizz"] ["","","","","buzz"]

或者使用暴力的方式:

代码语言:javascript
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zip [1..100] $ cycle ["","","fizz","","buzz","fizz","","","fizz","buzz","","fizz","","","fizzbuzz"]
票数 10
EN

Stack Overflow用户

发布于 2012-01-29 03:23:30

不如..。

代码语言:javascript
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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       =  ""
票数 4
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/9047775

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