neverthrow
trio
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neverthrow | trio | |
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16 | 19 | |
2,447 | 5,883 | |
- | 1.6% | |
5.8 | 9.5 | |
4 days ago | 2 days ago | |
TypeScript | Python | |
MIT License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
neverthrow
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Error Handling Patterns
Very timely, was just trying to understand how to improve error handling with typescript recently and came across neverthrow (https://github.com/supermacro/neverthrow) which looks promising…
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Ask HN: What is the “proper” way to do error-handling in TypeScript?
On my team we use Rust-style Result/Option types for any unrecoverable exceptions.
https://github.com/supermacro/neverthrow
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The gotcha of unhandled promise rejections
I was happy when Promise became available, but in retrospect I'd wish we would have skipped ahead and gotten Observable (e.g: https://rxjs.dev/) instead to enable more powerful functionality and composition etc.
In Typescript dealing with rejection is also painful since rejection reasons can't be guaranteed to be Error even when you always take care of that. And it can't help you guarantee that you're handling all types of errors thrown. For that purpose I'm thinking of using https://github.com/supermacro/neverthrow#readme or https://swan-io.github.io/boxed.
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How has learning Rust been a benefit to you in other programming areas?
I highly recommend the neverthrow library for bringing Result to Typescript.
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functional error handling (functions return error) recommendations
I like the Result monad from here: https://github.com/supermacro/neverthrow
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How to know if a function throws in Typescript?
What do you think of neverthrow?
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ts-results - a lightweight result wrapper to exhibit success/failure instead of using/throwing exceptions.
I use https://github.com/supermacro/neverthrow for this
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Handle Javascript errors like in Go
See neverthrow as an example of correctly encoding the failure into the return type of the function.
- Why doesn't typescript have a throws type to annotate functions that can throw an error?
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what's the recommended way to handle error in TS?
I use Neverthrow. Same idea, concurrent projects...
trio
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trio VS awaits - a user suggested alternative
2 projects | 9 Dec 2023
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In what ways are channels are better than the traditional await?
Incidentally, the alternative event loop implementation trio in python does not have "gather", you also need channels, and it's a deliberate design choice - there is some discussion about that in this ticket https://github.com/python-trio/trio/issues/2188
- Polyphony: Fine-Grained Concurrency for Ruby
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This Week In Python
trio – a friendly Python library for async concurrency and I/O
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Python projects with best practices on Github?
trio. the best code, the best documentation, awesome community.
- Trio: Structured Concurrency for Python
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The Heisenbug lurking in your async code (Python)
I'll +1 the Trio shoutout [1], but it's worth emphasizing that the core concept of Trio (nurseries) now exists in the stdlib in the form of task groups [2]. The article mentions this very briefly, but it's easy to miss, and I wouldn't describe it as a solution to this bug, anyways. Rather, it's more of a different way of writing multitasking code, which happens to make this class of bug impossible.
[1] https://github.com/python-trio/trio
[2] https://docs.python.org/3/library/asyncio-task.html#task-gro...
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The gotcha of unhandled promise rejections
It's similar to manual memory management.
Structured concurrency is one approach to solving this problem. In a structured concurrency a promise would not go out of scope unhandled. Not sure how you would add APIs for it though.
See Python's trio nurseries idea which uses a python context manager.
https://github.com/python-trio/trio
I'm working on a syntax for state machines and it could be used as a DSL for promises. It looks similar to a bash pipeline but it matches predicates similar to prolog.
In theory you could wire up a tree of structured concurrency with this DSL.
https://github.com/samsquire/ideas4#558-assign-location-mult...
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Python Asyncio: The Complete Guide
Not complete - doesn't include Task Groups [1]
In fairness they were only included in asyncio as of Python 3.11, which was released a couple of weeks ago.
These were an idea originally from Trio [2] where they're called "nurseries" instead of "task groups". My view is that you're better off using Trio, or at least anyio [3] which gives a Trio-like interface to asyncio. One particularly nice thing about Trio (and anyio) is that there's no way to spawn background tasks except to use task groups i.e. there's no analogue of asyncio's create_task() function. That is good because it guarantees that no task is ever left accidentally running in the background and no exception left silently uncaught.
[1] https://docs.python.org/3/library/asyncio-task.html#task-gro...
[2] https://github.com/python-trio/trio
[3] https://anyio.readthedocs.io/en/latest/
- Anyone here able to help with a python issue?
What are some alternatives?
ts-results - A typescript implementation of Rust's Result object.
uvloop - Ultra fast asyncio event loop.
oxide.ts - Rust's Option<T> and Result<T, E>, implemented for TypeScript.
curio - Good Curio!
fp-ts - Functional programming in TypeScript
asyncio
result - A TypeScript result type taking cues from Rust's Result and Haskell's Either types
Twisted - Event-driven networking engine written in Python.
functional-conditionals - A library for writing if / else if / else in a functional way.
LDAP3 - a strictly RFC 4510 conforming LDAP V3 pure Python client. The same codebase works with Python 2. Python 3, PyPy and PyPy3
eslint-plugin-promise - Enforce best practices for JavaScript promises
DearPyGui - Dear PyGui: A fast and powerful Graphical User Interface Toolkit for Python with minimal dependencies