Haskell non-digit string list to a different list [closed]

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I have a list ['%','&','/']. How can i convert it into the form [%,&开发者_如何学Python,/] ?

---

myShow :: [Char] -> String
myShow s = concat ["[", intersperse ',' s, "]"]

Use it like this:

putStrLn (myShow ['%','&','/'])     -- prints [%,&,/]

---

But if you want this to work with show and print, you will have to define your own type:

data MyChar = MyChar Char

instance Show MyChar
  where show (MyChar ch) = [ch]

And then operate on [MyChar] rather than [Char]:

let myList = map MyChar ['%','&','/']
-- ... do whatever you want with myList ...
print myList                        -- prints [%,&,/]

---

"[" ++ intercalate ',' list ++ "]"

intercalate is declared in Data.List.