[Haskell-cafe] About do notation.

Brandon S. Allbery KF8NH allbery at ece.cmu.edu
Tue Oct 14 23:58:17 EDT 2008

On 2008 Oct 14, at 23:55, Magicloud wrote:
>   As some articles say, do notation is expand to (>>) and (>>=) when  
> being compiled.
>   So I want to know the details. Like:
> main = do
> a <- getArgs
> b <- getLine
> myFunc1 (head a) b
> myFunc2 b (head a)
>   I cannot figure out what is the (>>) and (>>=) way of this.

If you are on FreeNode IRC, you can ask lambdabot to @undo such  
expressions (would need to use braces and semicolons instead of layout  

main = getArgs >>=
        \a -> getLine >>=
        \b -> myFunc1 (head a) b >>
        myFunc2 b (head a)

brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH

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