[Haskell-cafe] Lazy Lists and IO
stefanor at cox.net
Wed Jul 11 16:46:51 EDT 2007
On Wed, Jul 11, 2007 at 10:33:06PM +0200, Chaddaï Fouché wrote:
> 2007/7/11, Andrew Coppin <andrewcoppin at btinternet.com>:
>> Ouch! That's gotta sting...
>> I wasn't aware that this function was so leathal. I use it constantly
>> all the time...
> It isn't that "lethal" usually. It's only because he was using it on
> an infinite stream that it hurt so much... If you use it on a normal
> stdin or a hGetContents on a file it will be fine (though you will
> lose the advantage of its laziness, for example constant memory
It was not infinite. This has nothing to do with infiniteness.
This has to do with Lazy lists and IO.
Specifically, reading to the end of a list of responses - before sending
all the requests.
Waiting for the second responce before sending the second request caused
a deadlock, even though only a finite number of responces would be
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