列表的字符串列表 - [[Char]]到[Char] haskell

Question

我需要将此ProxyPass /myapp http://localhost:8080/myapp ProxyPassReverse /myapp http://localhost:8080/myapp 之类的列表转换为此["a","b","c"]。我用的是

['a','b','c']

从splitOn 给我[[Char]]的函数。有没有办法将此字符串列表转换为char列表？假设字符串长度为1。

Answer 1

git checkout -b branch1_redo abcd123会为您提供与concat ["a", "b", "c"]

相同的字符串"abc"

Answer 2

是的，您可以使用concat :: [[a]] -> [a]：

Prelude> concat ["a","b","c"]
"abc"

由于String是[Char]的类型别名，因此"abc"是['a', 'b', 'c']的缩写：

Prelude> concat ["a","b","c"] == ['a', 'b', 'c']
True