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
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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