Ah, that's enlightening, and a good addition to
http://ghc.haskell.org/trac/ghc/ticket/8189
On Sat 07 Sep 2013 04:31:31 JST, Tom Ellis wrote:
FYI, rwbarton on Reddit produced a nice answer:
http://www.reddit.com/r/haskell/comments/1luan1/strange_io_sequence_behaviour/cc32ec4
On Wed, Sep 04, 2013 at 04:35:17PM +0100, Tom Ellis wrote:
As an addendum to the recent discussion, can anyone explain why main crashes
quickly with a stack overflow, whereas main' is happy to print Hi for ages
(eventually crashing due to an out of memory condition)?
bignum = 100 * 1000
As an addendum to the recent discussion, can anyone explain why main crashes
quickly with a stack overflow, whereas main' is happy to print Hi for ages
(eventually crashing due to an out of memory condition)?
bignum = 100 * 1000 * 1000
main = replicateM bignum (return ())
main' =
To give a very casual explanation, both mains are of the form do this a
bunch of times and return the results. Your first is do nothing and
return the ()s, but importantly, it has to execute all those nothings.
Your second is print hello a bunch and return the ()s. The list it wants
to eventually
Er, I seem to have misread and thought you were doing infinite replicateM,
so that explanation doesn't completely address your question. That's what I
get for reading on a phone!
On Sep 4, 2013 4:11 PM, Joe Q headprogrammingc...@gmail.com wrote:
To give a very casual explanation, both mains are
