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Grigoriy Volkov, 12/16/2019 02:02 PM

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h1. Haskell
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h2. Изучение
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Денис Москвин. Функциональное программирование на языке Haskell. stepik.org, видеокурс
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> "Часть 1.":https://stepik.org/course/75/syllabus
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> "Часть 2.":https://stepik.org/course/693/syllabus
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"О Haskell по-человечески":https://www.ohaskell.guide
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"Learn You a Haskell for Great Good!":http://learnyouahaskell.com
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"Real World Haskell by Bryan O'Sullivan, Don Stewart, and John Goerzen":http://book.realworldhaskell.org
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"ru.haskell— сообщество русскоговорящих Haskell-разработчиков":https://ruhaskell.org
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> "Полезные ссылки":https://ruhaskell.org/links.html
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"ru.haskell wiki":https://github.com/ruHaskell/ruhaskell/wiki
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> "Настройка редакторов для поддержки Haskell":https://github.com/ruHaskell/ruhaskell/wiki/%D0%9D%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B9%D0%BA%D0%B0-%D1%80%D0%B5%D0%B4%D0%B0%D0%BA%D1%82%D0%BE%D1%80%D0%BE%D0%B2-%D0%B4%D0%BB%D1%8F-%D0%BF%D0%BE%D0%B4%D0%B4%D0%B5%D1%80%D0%B6%D0%BA%D0%B8-Haskell
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"Haskell Cheatsheet":http://bxt.github.io/Ludus/haskell-cheatsheet/
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"haskell-trainings":https://github.com/google/haskell-trainings/releases
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"Stack cookbook":https://guide.aelve.com/haskell/stack-cookbook-ai0adh03
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"The Haskell Phrasebook":https://typeclasses.com/phrasebook
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24 40 Alexey Demakov
h2. Best practices
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* "Import modules properly":https://wiki.haskell.org/Import_modules_properly
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* "deriving via":https://www.parsonsmatt.org/2018/04/10/transforming_transformers.html
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h2. snippets
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* [[HaskellMaybeChecks]]
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* [[HaskellTypeLevelMachine]]
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h2. ghci running
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<pre>
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stack ghci protesk:lib protesk:exe:example-that-uses-protesk
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</pre>
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^^ running an executable that depends on the main lib requires listing the lib on the console!!
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h2. ghci debugging
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<pre>
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:set -fbreak-on-error -fbreak-on-exception
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:trace machineMain
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:force _exception
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:hist
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:back
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</pre>
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h2. libs
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* "co-log":https://kowainik.github.io/posts/2018-09-25-co-log
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* "named":https://github.com/monadfix/named arguments
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* "refined":http://nikita-volkov.github.io/refined/ — refinement types <pre>type ProperFraction = Refined (And (Not (LessThan 0)) (Not (GreaterThan 1))) Double</pre>
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* "Data.Sequence":http://hackage.haskell.org/package/containers-0.6.0.1/docs/Data-Sequence.html — list with fast append on both sides
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* "bound: Making de Bruijn Succ Less":https://hackage.haskell.org/package/bound — convenient combinators for working with "locally-nameless" terms. These can be useful when writing a type checker, evaluator, parser, or pretty printer for terms that contain binders like forall or lambda
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* "Workflow":https://github.com/agocorona/Workflow — computations resumable from storage (!)
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* "capability":https://hackage.haskell.org/package/capability — effects based on DerivingVia
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* "compose-trans":http://hackage.haskell.org/package/compose-trans
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* "filepath-bytestring":https://hackage.haskell.org/package/filepath-bytestring
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* "product-profunctors":http://hackage.haskell.org/package/product-profunctors generalization of Applicative
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* SMT:
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** "concat":https://github.com/conal/concat ("z3cat":https://github.com/jwiegley/z3cat/blob/master/test/Main.hs || "smt example":https://github.com/conal/concat/blob/master/examples/src/ConCat/SMT.hs) — *"Compiling to categories":http://conal.net/papers/compiling-to-categories/* — compiler plugin for translating normal Haskell functions (on standard types) to SMT, etc.
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** "SBV: SMT Based Verification":https://leventerkok.github.io/sbv/ — translates Haskell functions on custom symbolic types
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* Testing:
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** "leancheck":https://hackage.haskell.org/package/leancheck enumerative property-based testing core
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*** "extrapolate":https://hackage.haskell.org/package/extrapolate generalize counter-examples of properties
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*** "speculate":https://hackage.haskell.org/package/speculate discover properties
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*** "fitspec":https://hackage.haskell.org/package/fitspec refine properties by mutation
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** "hedgehog":https://github.com/hedgehogqa/haskell-hedgehog property
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** "dejafu":https://github.com/barrucadu/dejafu concurrency
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** "type-spec: type level testing eDSL":https://hackage.haskell.org/package/type-spec
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** "should-not-typecheck":https://github.com/CRogers/should-not-typecheck
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* Constraints:
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** https://github.com/ekmett/constraints
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** https://github.com/mikeizbicki/ifcxt
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** https://github.com/rampion/constraint-unions
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* HKD:
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** https://github.com/jcpetruzza/barbies
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** https://github.com/i-am-tom/higgledy
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** https://hackage.haskell.org/package/rank2classes
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* (Reversible) Parsing:
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** invertible-grammar _by Eugene Smolanka, Sergey Vinokurov_ 
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*** http://hackage.haskell.org/package/invertible-grammar
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** Syntax _by Paweł Nowak (Pavel Christof?) @2014_ *USED NOW*
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*** https://hackage.haskell.org/package/syntax
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*** https://hackage.haskell.org/package/syntax-attoparsec
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*** https://hackage.haskell.org/package/syntax-printer
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*** https://hackage.haskell.org/package/semi-iso
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** Unparse _by Tillmann Rendel and Klaus Ostermann @2010_ ("paper":https://www.informatik.uni-marburg.de/~rendel/unparse/)
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*** invertible-syntax _by Tillmann Rendel @2010_
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**** https://hackage.haskell.org/package/invertible-syntax _@2010-2011_
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**** https://hackage.haskell.org/package/partial-isomorphisms _@2011-2017_
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**** https://hackage.haskell.org/package/invertible _@2016-2018_
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*** invertible-grammar _by Eugene Smolanka and Sergey Vinokurov @2015-2019_
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**** https://hackage.haskell.org/package/invertible-grammar _@2015-2019_
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**** "Reversible S-expression parser":https://github.com/esmolanka/sexp-grammar _@2015-2019_
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** Fresnel, Prism-based unified parsers and pretty printers _by Fraser Tweedale @2016_
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*** https://github.com/frasertweedale/hs-fresnel _@2016-2017_
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** (related) new @optics@ library, alternative to @lens@ _@2019_
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*** "Announcement":https://www.well-typed.com/blog/2019/09/announcing-the-optics-library/
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*** https://hackage.haskell.org/package/optics
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*** https://hackage.haskell.org/package/optics-core
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** (related) Binary (ByteString-based) serialization _by Lennart Kolmodin @2006-2019_
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*** https://hackage.haskell.org/package/binary
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h2. exts
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* "Existential Quantification":https://ocharles.org.uk/guest-posts/2014-12-19-existential-quantification.html
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* "RebindableSyntax":https://ocharles.org.uk/guest-posts/2014-12-06-rebindable-syntax.html — overloading built-in operators / do notation
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* "NullaryTypeClasses":https://ocharles.org.uk/posts/2014-12-10-nullary-type-classes.html — global implementation of one thing
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* "DataKinds":http://ponies.io/posts/2014-07-30-typelits.html , TypeFamilies (+ GHC.TypeLits) — type-level annotations
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** "Basic Type Level Programming in Haskell":https://www.parsonsmatt.org/2017/04/26/basic_type_level_programming_in_haskell.html
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** "Parsing type-level strings in Haskell":https://kcsongor.github.io/symbol-parsing-haskell/
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** "Servant, Type Families, and Type-level Everything":https://arow.info/blog/posts/2015-07-10-servant-intro.html
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** "Haskell Type Names as Strings":http://www.mchaver.com/posts/2017-12-12-type-name-to-string.html
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h2. other
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* https://github.com/cohomolo-gy/haskell-resources
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* "ST Monad":https://medium.com/permutive/having-your-cake-and-eating-it-9f462bf3f908 for imperative algorithms
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* "A Rosetta Stone for Haskell Abstractions":http://reduction.io/essays/rosetta-haskell.html Applicative, StateT, Lens
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* "Is it possible to place inequality constraints on haskell type variables?":https://stackoverflow.com/questions/6939043/is-it-possible-to-place-inequality-constraints-on-haskell-type-variables
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* "Practical uses of the Tardis monad?: 'build a packet ... where the fixed-length lengths and offsets of some variable length data are sent out before the actual data themselves'":https://www.reddit.com/r/haskell/comments/b5g70h/practical_uses_of_the_tardis_monad/ejdogtt/
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* "Comonadic builders":https://chshersh.github.io/posts/2019-03-25-comonadic-builders
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* "GHC.Stack":https://hackage.haskell.org/package/base-4.10.0.0/docs/GHC-Stack.html — can get code position for DSL
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* "GHC's Specializer: Much More Than You Wanted to Know":https://reasonablypolymorphic.com/blog/specialization/
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* "Type Classes and Constraints":https://gist.github.com/Icelandjack/5afdaa32f41adf3204ef9025d9da2a70
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* "Reified dictionaries":https://kseo.github.io/posts/2017-02-06-reified-dictionaries.html GADT allows us to reify a constraint as an explicit dictionary
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* "Demystifying MonadBaseControl":https://lexi-lambda.github.io/blog/2019/09/07/demystifying-monadbasecontrol/
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* "The Functor Combinatorpedia":https://blog.jle.im/entry/functor-combinatorpedia.html
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* Cont:
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** "Control.Monad.Trans.Cont":https://hackage.haskell.org/package/transformers-0.5.2.0/docs/Control-Monad-Trans-Cont.html
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** "CC-delcont":https://wiki.haskell.org/Library/CC-delcont
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** "Delimited continuations in Haskell":http://okmij.org/ftp/continuations/Haskell-tutorial.pdf
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** "A Monadic Framework for DelimitedContinuations":https://www.cs.indiana.edu/~dyb/pubs/monadicDC.pdf
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** "Haskell's continuation monad":https://github.com/quchen/articles/blob/master/cont_monad.md
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* Tagless Final / Overloading:
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** "Introduction to Tagless Final":https://serokell.io/blog/tagless-final
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** "Tagless Final Encoding in Haskell":https://jproyo.github.io/posts/2019-03-17-tagless-final-haskell.html
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** "Typed final (aka, ``tagless-final'') style":http://okmij.org/ftp/tagless-final/ is a general method of embedding domain-specific languages (DSL)
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** "Overloading lambda":http://conal.net/blog/posts/overloading-lambda
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* TypeFamilies:
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** "Functional Dependencies & Type Families":https://gvolpe.github.io/blog/functional-dependencies-and-type-families/
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** "Associated Types and Haskell":http://amixtureofmusings.com/2016/05/19/associated-types-and-haskell/
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** "Partially applied type families GHC Proposal":https://github.com/ghc-proposals/ghc-proposals/pull/52
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** "On the arity of type families":https://ryanglscott.github.io/2019/05/26/on-the-arity-of-type-families/ + "Higher-order Type-level Programming in Haskell":https://www.microsoft.com/en-us/research/uploads/prod/2019/03/ho-haskell-5c8bb4918a4de.pdf
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** "Type Class Instances for Type-Level Lambdas in Haskell":ftp://ftp-sop.inria.fr/indes/TFP15/TFP2015_submission_19.pdf
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** "Defunctionalization for Haskell Type Families":https://free.cofree.io/2019/01/08/defunctionalization/
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** "Haskell with only one type family":https://blog.poisson.chat/posts/2018-08-06-one-type-family.html
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* HKD:
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** "Functor Functors":http://web.archive.org/web/20190501095522/https://www.benjamin.pizza/posts/2017-12-15-functor-functors.html
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** "Higher-Kinded Data":https://reasonablypolymorphic.com/blog/higher-kinded-data/ 
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** "Deriving instances for higher-kinded data":https://stackoverflow.com/questions/49618667/deriving-instances-for-higher-kinded-data
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* "Haskell's kind system - a primer":https://diogocastro.com/blog/2018/10/17/haskells-kind-system-a-primer/
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* "Advent of optics":https://chrispenner.ca/posts/advent-of-optics-01 (не в смысле библиотеки optics)
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* "Four ways to partially apply constraint tuples":https://ryanglscott.github.io/2019/11/30/four-ways-to-partially-apply-constraint-tuples/