[Haskell-beginners] A first try

[David Place]

On Jun 28, 2011, at 8:39 AM, Heinrich Apfelmus wrote:

> There is still a return value, but  withFile  makes sure that it's evaluated to WHNF. If you choose a = (), then you're fine, otherwise it's not entirely foolproof.

Yes, I was wondering about this.  Since it is still possible to get in trouble in exactly the same way, why is this an improvement over withFile?  If you return () from withFile, you have the same benefit.


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