Re: [Haskell-cafe] Execution order in IO

And this is because the implementation of IO is *specifically* crafted to guarantee this ordering. It is not a property of monads in general, or do syntax in general. On 15 April 2015 11:31:38 pm AEST, Ryan Yates wrote:

In your example a and b will be ordered as you would expect.

On Wed, Apr 15, 2015 at 9:26 AM, Jon Schneider wrote:

...

Perhaps I need to be more specific.

main = do a <- getLine b <- getLine

Can we say "a" absolutely always receives the first line of input and if so what makes this the case rather than "b" receiving it ? Or do things need to be slightly more complicated to achieve this ?

Sorry it's just the engineer in me. I think once I've got this clear I'll be happy to move on.

Jon

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