[Haskell-cafe] Code walking off the right edge of the screen

[Jeremy Shaw]

At Sat, 20 Jun 2009 20:45:16 +0200,
Stephan Friedrichs wrote:

> If it's a function, you can use guards:
> 
> foo :: ...
> foo something somethingElse
>     | something     -> putStrLn "howdy there!"
>     | somethingElse -> putStrLn "howdy ho!"
>     | otherwise     -> ...

You can also artificially introduce places to use gaurds inside a function:

foo =
    let x | 1 > 1     = "uh-oh"
          | otherwise = "all is well"
    in x

bar =
    case () of
      _ | 1 > 1     -> "uh-oh"
        | otherwise -> "all is well"

- jeremy