2015-02-24 10:30:12 +00:00
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---
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title: Monad Transformers
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author: Michael Snoyman <michael@fpcomplete.com>
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description: What transformers are, why they're useful, what to be aware of
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first-written: 2015-02-24
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last-updated: 2015-02-24
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last-reviewed: 2015-02-24
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---
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* Basic transformers
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* Simple examples of usage
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* Pitfalls of Writer laziness
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* Dealing with exceptions and control structures (monad-control and exceptions packages), and losing state
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* Monad transformers: [EitherT vs IO](http://stackoverflow.com/questions/25752900/exceptions-and-monad-transformers/25753497#25753497)
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2015-02-25 05:06:15 +00:00
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* https://github.com/kqr/gists/blob/master/articles/gentle-introduction-monad-transformers.md (need to get permission to relicense)
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