[Haskell-beginners] Getting a specified number of lines from stdin

[frantisek kocun]

Here is the answer

http://stackoverflow.com/questions/34910992/iterate-io-actions-and-laziness

You need to write recursive function, not to use iterage or to

liftM (take 5) $ sequence $ repeat (unsafeInterleaveIO getLine)


On Sun, Mar 6, 2016 at 11:38 AM, Nicolaas du Preez <njdupreez at yahoo.com>
wrote:

> Good day All,
>
> Why does
>
>     liftM (take 5) $ sequence $ repeat getLine
>
> not stop at reading only 5 lines from stdin but keeps on reading more?
>
> What I’m really trying to achieve is to get input from the user until
> an empty line is read with the code below.  But this doesn’t work
> as I expected, similar to the above.
>
>     liftM (takeWhile (/= "")) $ sequence $ repeat getLine
>
>
> Regards,
> Nicolaas du Preez
>
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