[Haskell-beginners] Empty 'do' constructor
Sok H. Chang
shaegis at gmail.com
Sat Sep 25 03:21:37 EDT 2010
Thank you to your answer!
I indent me code as you said.
I tried using Tab, using spaces…
But can't work.
Is there another possibility?
2010. 9. 25. 오후 1:49 Brent Yorgey <byorgey at seas.upenn.edu> 작성:
> On Sat, Sep 25, 2010 at 01:43:33PM +0900, Sok H. Chang wrote:
>> I use Haskell Platform 2010.2.0.0 on WinXP, and jEdit.
>> I write my first code, and got error...
>> main = do cs <- readFile "C:\\SPR.txt"
>> putStrLn $ myManupulation cs
>> myManupulation cs = (unlines cs) ! 3
> Because putStrLn is not indented it is not considered part of the
> do-block. You should line it up under the stuff after the 'do',
> like this:
> main = do cs <- readFile "C:\\SPR.txt"
> putStrLn $ myManupulation cs
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