Chris Kuklewicz wrote:
What does lazy printing mean?
I assume it means you evaluate the head of the list, print it, then
recursively do this for the tail of the list. With an infinite list you
will get inifinite output.
I assume it does not mean you evaluate the whole list before printing
anything. This would prevent infinite lists from producing output.
Yes, that's exactly what I had in mind. I wanted to print [1..] (an
infinite list) with each number on a different line.
Thanks for the help. Yes, the function works now.
main = do
let hw = ["Hello"," ","World","!"]
mapM_ putStr hw
mapM_ putStrLn hw
putStr (unlines hw) -- see also: unwords, words, lines
printList hw
Cool. I didn't know about (un)words and unlines.
Cheers,
Daniel.
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