eff
scrabble
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eff | scrabble | |
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18 | 3 | |
546 | 15 | |
0.9% | - | |
0.0 | 2.5 | |
12 months ago | 11 months ago | |
Haskell | Haskell | |
ISC License | MIT License |
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eff
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Haskellers who moved to Rust: What has been your experience?
You can swap-out implementations for testing, avoid the crazy N^2 instances issues, etc. They're pretty cool. Currently there are many competing libraries. polysemy and eff both have good examples on their homepages.
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What are the current hot topics in type theory and static analysis?
Effect systems and Algebraic effects. ocaml has just released a stripped-down effect system. People are also working on Effect systems for Haskell (eff, fused-effects, effet). Koka is a language built with effects first and foremost and it’s rapidly gaining popularity. Unison also has effects.
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[ANNOUNCE] GHC 9.6.1 is now available
There are also a few subtle issues that arise with delconts related to semantics of higher order effects (see here and here), but they might be solvable.
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Effectful | Paweł Szulc | Lambda Days 2022
Details are in https://github.com/hasura/eff/issues/12 and https://www.reddit.com/r/haskell/comments/pywuqg/unresolved_challenges_of_scoped_effects_and_what/.
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Looking for languages that combine algebraic effects with parallel execution
You'll get fearless parallel with STM in the mixture, and GHC is getting a work in progress effect system for Haskell, as Delimited continuation primops has been merged.
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Should I pick up OCaml or Haskell?
My last example is algebraic effects, some of which have been made possible in a both practical and efficient way thanks to extremely recent research, and that I can use to implement architectures like Ports and Adapters or Clean Architecture and have very maintainable code. (Extensible Effects — An Alternative to Monad Transformers was published in 2013, Effect Handlers in Scope was published in 2014 and they are behind Polysemy, while there is ongoing work on effects with even better performance, like Eff)
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[ANN] cleff - fast and consise extensible effects
cleff's Eff monad is esentially implemented as a ReaderT IO. [...] This is first done by eff, [...]
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Opinions on Reader + Continuation-based IO?
Here is link number 1 - Previous text "eff"
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Where's more discussion of the designs of effect systems?
Languages such as Koka only support algebraic effects, not scoping operations such as catch and listen. The Effect Handlers in Scope paper introduces scoping operations, which lead to the Haskell libraries fused-effects and polysemy, but they turned out to have some weird semantics. eff is her effort to fix that.
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Languages that don't support Error-Catching as a Control Structure?
There are a few languages that have algebraic effect systems, most notably Haskell, but these systems are implemented as libraries, not baked into the language (which can have advantages and disadvantages).
scrabble
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How can I move from a basic hello world/number program to something more substantial?
I wrote this Scrabble tutorial for uni students at the same sort of stage as you. Maybe they're a tiny bit further on but you should find it pretty self-contained. It includes a CLI with a curses lib so you would learn how to do that.
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I’ve tried to learn Haskell several times. But keep failing
In case it's useful, here's a tutorial of mine that gets into creating a library and a couple of frontends for playing a board game, mostly using "boring Haskell" but exposing some useful patterns and touching on widely used libs for JSON, lenses, websockets etc https://github.com/jimburton/Scrabble
- Book on Haskell development for not-quite-beginners
What are some alternatives?
freer-simple - A friendly effect system for Haskell
mtl-style-example - A small example of using mtl style to unit test effectful code
fused-effects - A fast, flexible, fused effect system for Haskell
frp-zoo - Comparing many FRP implementations by reimplementing the same toy app in each.
in-other-words - A higher-order effect system where the sky's the limit
polysemy - :gemini: higher-order, no-boilerplate monads
extensible-effects - Extensible Effects: An Alternative to Monad Transformers
ihp - 🔥 The fastest way to build type safe web apps. IHP is a new batteries-included web framework optimized for longterm productivity and programmer happiness
pcre2 - Complete Haskell binding to PCRE2
FStar - A Proof-oriented Programming Language
hoogle - Haskell API search engine