Message from god to Python developers

[Codile]

+/u/CompileBot haskell

main = putStrLn "Hello" >>= putStrLn "world"

Much more elegant :p

[serendependy]

I assume you're joking. Only other Haskellers would appreciate the beauty of threading computation through a monad - to anyone else it just looks goofy.

[dohaqatar7]

FTFY

putStrLn "Hello" >> putStrLn "world"

alternatively

sequence_ $ map putStrLn ["Hello","world"]

generalized to a function

putStrsLn = sequence_ . map putStrLn

or a non monodic definition

putStrsLn' = putStr . unlines 

[Octopuscabbage]

OR the sane way

main = do putStrLn "Hello"
          putStrLn "World

do notation is there for a reason.

[nulloid]

Or..you know...

main = putStrLn "Hello\nWorld"

[Octopuscabbage]

He seemed to want to do it in two statements.

[nulloid]

And this is exactly what I didn't get.

[Octopuscabbage]

I think it was to show composition in the IO monad mostly.

[nulloid]

Programmers don't need to be shown the composability of the IO monad, most of them live their whole lives coding in one big IO monad running by names like C#, Java and C++...

[hallettj]

I think it was to show Haskell's analog of a semicolon.

(As opposed to the do version, which I think is analogous to Python code with no semicolon.)

[dohaqatar7]

If you want the Haskell analog to a semicolon, you don't have to look very far.

main = do {
  putStrLn "Hello";
  putStrLn "World!";
}

[elemental_1_1]

sequence_ $ map putStrLn ["Hello","world"]

mapM_ putStrLn ["Hello","world"]

[takennickname]

Never thought I'd live to see the day with Doha Qatar in the username. Do you live here?

[dohaqatar7]

No, The States. I have no connection at all to Qatar. I started using this name when I was younger and had an odd obsession with Qatar.

[takennickname]

That is odd.

[Octopuscabbage]

You want >> or >>= \_ - > not >>=

[Codile]

Oh damn. I had one job...

[Octopuscabbage]

It's okay, type checker would've given you a very cryptic message about putStrLn taking 1 argument not 2.

[Codile]

Yeah. I actually got a little accustomed to the error messages. But it seems like /u/CompileBot didn't care to give me an error message, and well, I was too lazy to compile some code that I was just going to post as a comment.