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2021-04-22 23:21:25 xcmw joins (~textual@dyn-72-33-2-152.uwnet.wisc.edu)
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2021-04-22 23:37:05 <edwardk> geekosaur: comonads and monads serve very different purposes in haskell. i find monads tend to build up to a nice throw-everything-and-the-kitchen-sink-in coding pattern, where you gather up all the functionality you want in one place. because monads are easy to get into and hard to get out of.
2021-04-22 23:37:08 <edwardk> er solidus-river
2021-04-22 23:37:49 <edwardk> on the other hand comonads are super easy to 'get out of' but hard to build/keep around. so you tend to wind up with lots of little comonads helping you out in your code base, if you know to look for them
2021-04-22 23:39:04 <edwardk> sure there are a few extra interesting ones, comonads for cellular automata, or streaming calculations, but mostly they wind up being little thin wrappers around some data type that give you an extra bit of functionality. e.g. the Ur comonad for unrestricted use in linear-base, or some kind of Env comonad that gives you a piece of extra data
2021-04-22 23:42:18 <solidus-river> thanks, those links are dense to parse but i'll keep readin em and check back if nothings clicking next week, really want to grok comonads and arrows or kleisli composition
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2021-04-22 23:43:10 <solidus-river> I got scared off from using stateT in things after hearing about the leak problems is this reasonable or are those leaks edge cases that are easily avoided
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2021-04-22 23:57:07 <solidus-river> these comonad posts are very interesting but sound like intense use cases, whats a pedestrian example of a comonad. Cellular automata are cool but also seem really abstract
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2021-04-23 00:32:01 <nshepperd2> what are the leak problems?
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2021-04-23 00:34:32 <solidus-river> not very familiar I'm probably referencing something outdated
2021-04-23 00:34:48 <solidus-river> some fpcomplete blog post around experiences with it
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