eqwalizer
kino
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eqwalizer | kino | |
---|---|---|
11 | 4 | |
499 | 326 | |
1.0% | 5.5% | |
8.4 | 8.7 | |
8 days ago | 4 days ago | |
Scala | Elixir | |
Apache License 2.0 | Apache License 2.0 |
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eqwalizer
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Switching to Elixir
I don't think the implementation itself is at fault, but yes, I do think that the design of dialyzer makes it an (at times) faulty type checker. The unfortunate reality of a type checker that fails sometimes is that it makes it mostly useless because you can never trust that it'll do the job.
To be clear, I've had it fail in a function where I've literally specced that very function to return a `binary` but I'm returning an `integer` in one of the cases. This is a very shallow context but it can still fail. Now add more functions, maybe one more `case`.
I think an entire rethink of type checking on the BEAM had to be done and that's why eqWalizer[0] was created and why Elixir is looking to add an actual sound, well-developed type checker. Gleam[1] I would assume is just a Hindley-Milner system so that's completely solid. `purerl`[2] is just PureScript for the BEAM so that's also Hindley-Milner, meaning it's solid. `purerl` has some performance issues caused by it compiling down to closures everywhere but if you can pay that cost it's actually pretty fantastic. With that said my bet for the best statically typed experience right now on the BEAM would be `gleam`.
0 - https://github.com/WhatsApp/eqwalizer
1 - https://gleam.run
2 - https://github.com/purerl/purerl
- Unpacking Elixir: Concurrency
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eqwalizer VS Gradualizer - a user suggested alternative
2 projects | 17 Apr 2023
- Erlang: The coding language that finance forgot
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Phoenix 1.7 is View-less
While it's not static-typing, compile-time type checking for Erlang have come a long way: Eqwalizer works pretty well - but I may be biased since my employer sponsors the project.
1. https://github.com/WhatsApp/eqwalizer
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[New] How do you verify program correctness in Elixir?
Note there is also research happening in this area by the Elixir team. The WhatsApp is also working on static types for Erlang, which I am certain will be available for Elixir too at some point.
- Eqwalizer: A Type-Checker for Erlang
- Eqwalizer: WhatsApp’s Erlang Type Checker
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Elixir Livebook now as a desktop app
From the discord blog posts it seems that elixir powers the chat system, with rust and python as the other two main languages in their stack.
As for whatsapp, they are mainly a erlang shop and yesterday they open sourced a type checker for erlang:
https://github.com/WhatsApp/eqwalizer
kino
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ElixirConf 2022 - That's a wrap!
José is adamantly championing Livebook as a tool for learning the language and teaching aspiring alchemists. In particular, he spoke about the breadth of possibilities for visualising aspects of Livebook using Kino, such as charts, graphs, and mermaid diagrams. As mentioned previously, Dockyard Academy is taking this approach with their bootcamp curriculum, and is using this suite of visualisation tools alongside smart cells to lower the barrier to entry for new developers.
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Elixir Livebook now as a desktop app
I think this is a fair analogy, but maybe I'd add that LiveBooks uses MarkDown markupfor the non-code part of the notebook, make it far more readable, and with more visualizations coming in.
For example, recently an addition to add automatically generated sequence diagrams to Livebook Kino (https://github.com/livebook-dev/kino/pull/165). So generate code which shows a supervision tree, and automatically create a visual diagram of the code in one place. Pretty great for learning and explanatory material.
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Sequence Diagrams representing elixir?
There's an upcoming feature in Livebook Kino that is related do automatically generated sequence diagrams for process communication: https://github.com/livebook-dev/kino/pull/165
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Livebook Animations
So I posted this issue (kino#48) and implemented a new widget Kino.ImageDynamic which can be updated with Kino.ImageDynamic.push/2.
What are some alternatives?
gradient - Gradient is a static typechecker for Elixir
livebook - Automate code & data workflows with interactive Elixir notebooks
erllambda - AWS Lambda in Erlang
nerves_livebook - Develop on embedded devices with Livebook and Nerves
explorer - Series (one-dimensional) and dataframes (two-dimensional) for fast and elegant data exploration in Elixir
kino_db - Database integrations for Livebook
FunkyABX - Audio blind tests
Gradualizer - A Gradual type system for Erlang
axon - Nx-powered Neural Networks
bandit - Bandit is a pure Elixir HTTP server for Plug & WebSock applications
IElixir - Jupyter's kernel for Elixir programming language