哈斯克尔：单词，单词分隔符 [英] Haskell : words, unwords delimiter

问题描述

有什么方法可以在haskell中为 words 和 unwords 提供一个分隔符，以使它类似于分裂并加入python？

解决方案

不，但它们真的只是（优化版本） 数据.List.break 和 Data.List.intersperse 。

  pythonicSplit :: String  - >字符 - > [String] 
 pythonicSplit_ = [] 
 pythonicSplit sc = let（r，rs）= break（== c）s 
 in r：pythonicSplit rs c 
 
 pythonicJoin :: [String]  - >字符 - > String 
 pythonicJoin ss c = intersperse c ss  - 或者：flip intersperse 
  

Is there any way I can provide a delimiter to words and unwords in haskell, to make it similar to split and join in python?

解决方案

No, but they're really just (optimized versions of) applications of Data.List.break and Data.List.intersperse, respectively.

pythonicSplit      :: String -> Char -> [String]
pythonicSplit "" _ =  []
pythonicSplit s  c =  let (r,rs) = break (== c) s
                       in r : pythonicSplit rs c

pythonicJoin       :: [String] -> Char -> String
pythonicJoin  ss c =  intersperse c ss -- or: flip intersperse

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