Hegel
ts-sql
Hegel | ts-sql | |
---|---|---|
15 | 28 | |
2,109 | 3,114 | |
- | 0.0% | |
0.0 | 0.0 | |
3 months ago | almost 3 years ago | |
JavaScript | TypeScript | |
MIT License | - |
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Hegel
- Ask HN: Are “normal” vocabulary getting depleted by tech-brand hijacking?
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Hegel – An advanced static type checker for JavaScript
unfortunately, the project is on pause for the time being [1]
[1]: https://github.com/JSMonk/hegel/issues/355#issuecomment-1075...
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Ezno
Thank you. Just checked out the Bagel post (https://www.brandons.me/blog/the-bagel-language) and it looks really cool. Identifying pure functions (whether that is by syntax annotation or from synthesis) is a really good idea, gives me some ideas for doing function inlining in Ezno. I like the "Misc niceties" section, a few of those may of may not be on Ezno's todo list :)
The automatic / inferred generic restrictions is quite cool. https://hegel.js.org/ got there before me! Basic restriction modification is quite simple e.g. `(x) => Math.sin(x)`, x wants to be a number so can add that restriction. It gets more difficult with higher poly types. `(someObj) => Math.sin(someObj.prop1.prop2)` requires modifying not just `someObj` but a property on a property on it. And `(x, y) => printString(x + y)` requires doing even more complex things. But its definitely possible!
- Hegel: advanced static type checker for JavaScript
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The TypeScript Experience
Can TypeScript be improved in this respect? Or, in broader terms, can a superset of JavaScript support a sound type system without becoming overly complicated?
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Differences between TypeScript and Elm
An alternative to TypeScript can be Flow, a library maintained by Facebook. Flow, similarly to TypeScript, is not a sound type system. "Flow tries to be as sound and complete as possible. But because JavaScript was not designed around a type system, Flow sometimes has to make a tradeoff". Another alternative is Hegel, a type system that "attempts" to be sound. It is unclear to me if the attempt succeeded or not but it is worth checking.
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An introduction to type programming in TypeScript – zhenghao
Check out Hegel[0], it uses Flow syntax, it's compatible w/ .d.ts type definitions and has a smarter type inference model than both TS and Flow IMHO.
[0] https://hegel.js.org/
- Hegel: a type checker for JavaScript with optional type annotations for preventing runtime type errors
ts-sql
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Type-Safe Printf() in TypeScript
There is an implementation of SQL that operates on a table shaped type, entirely at type level. For your amusement: https://github.com/codemix/ts-sql
There are a bunch of more practical takes that codegen types from your database and generate types for your queries, eg: https://github.com/adelsz/pgtyped
To me the second approach seems much more pragmatic because you don’t need to run a SQL parser in a fairly potato interpreter on every build
- Functions and algorithms implemented purely with TypeScript's type system
- Que opinan de esta forma de actualizar estados complejos en React, creen que es buena practica o tienen una mejor forma?
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How to Sell Elixir Again (2023)
> If I would level criticisms at dialyzer it would be its sometimes difficult to read warnings, it’s speed (despite being multithreaded) and the race conditions in the VS Code plugin (which is looking for extra maintainers – if I had time I would help).
One of the advantages of TypeScript is that VSCode is written in TypeScript, and both VSCode and TypeScript are developed by the same company, so there's a really nice synergy there. I imagine Kotlin users feel the same way using Jetbrains products, and Swift users feel the same way about XCode.
Dialyzer looks interesting, but I can't imagine giving up on the expressiveness of TypeScript. Some of the things you can do with generics, mapped types, intersection types, template literal types, conditional types, and utility types are almost mind boggling. It's difficult to reap all of the benefits of static analysis without some of these advanced type operators. The type manipulation section of the TS manual is really underrated.
Someone for example wrote an SQL parser in TypeScript that requires no runtime code [1]. It can infer the types of an SQL query's result based on an SQL string without any runtime code execution. There was a similar project where someone built a JSON parser entirely using the type system [2]. There's also an ongoing discussion on Github about the the fact that TypeScript's type system appears to be a Turing-complete language with some other cool examples [3]. My point is that the type system is incredibly expressive. You rarely run into an idiom that can't be typed effectively.
[1] https://github.com/codemix/ts-sql
[2] https://twitter.com/buildsghost/status/1301976526603206657
[3] https://github.com/microsoft/TypeScript/issues/14833
- Please use Typescript
- TypeScripting the Technical Interview
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Pls can we go back to traditional languages?
If anyone saw this meme and thought, "damn parsing a type from a SQL query, that looks useful" (as I did), the source appears to be from here.
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Type-Level FizzBuzz
I mean, why stop there? https://github.com/codemix/ts-sql
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HypeScript: Simplified TypeScript's type system in TypeScript's own type system
Which allows for things like this type that implements a simplified SQL query parser checked against a provided 'database' object:
https://github.com/codemix/ts-sql
This project was my go-to "nifty but pointless" example for TS string literal types before this article :)
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Deepkit – High-Performance TypeScript Framework
author of ts-sql[0] here, this looks great (and a way more practical approach!)
[0] https://github.com/codemix/ts-sql
What are some alternatives?
TypeScript - IO wrapper around TypeScript language services, allowing for easy consumption by editor plugins
slonik - A Node.js PostgreSQL client with runtime and build time type safety, and composable SQL.
Hindley Milner Definitions - Runtime type checking for JS with Hindley Milner signatures
Paste JSON as Code • quicktype - Xcode extension to paste JSON as Swift, Objective-C, and more
TypL - The Type Linter for JS
pgtyped - pgTyped - Typesafe SQL in TypeScript
io-ts - Runtime type system for IO decoding/encoding
lean4 - Lean 4 programming language and theorem prover
ramda - :ram: Practical functional Javascript
sqlx - 🧰 The Rust SQL Toolkit. An async, pure Rust SQL crate featuring compile-time checked queries without a DSL. Supports PostgreSQL, MySQL, and SQLite.
purescript - A strongly-typed language that compiles to JavaScript
kanel - Generate Typescript types from Postgres