cats-effect
hn-search
Our great sponsors
cats-effect | hn-search | |
---|---|---|
34 | 1,606 | |
1,948 | 523 | |
1.4% | 1.3% | |
9.7 | 2.9 | |
7 days ago | 6 months ago | |
Scala | TypeScript | |
Apache License 2.0 | 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.
cats-effect
-
A question about Http4s new major version
Those benchmarks are using a snapshot version of cats-effect. I don't know where that one comes from, but previously they were using a snapshot from https://github.com/typelevel/cats-effect/pull/3332 which had some issues (3.5-6581dc4, 70% performance degradation), which have since been resolved (see that PR for more info and comparative benchmarks).
-
The Great Concurrency Smackdown: ZIO versus JDK by John A. De Goes
Recently, CE3 has had similar issues reported across multiple repositories, almost an epidemic of reports!
-
40x Faster! We rewrote our project with Rust!
The one advantage Rust has over Scala is that it detects data races at compile time, and that's a big time saver if you use low level thread synchronization. However, if you write pure FP code with ZIO or Cats Effect that's basically a non-issue anyway.
-
Sequential application of a constructor?
See also cats-effect and fs2. cats-effect gives you your IO Monad (and IOApp to run it with on supported platforms). fs2 is the ecosystem’s streaming library, which is much more pervasive in functional Scala than in Haskell. For example, http4s and Doobie are both based on fs2.
-
Should I Move From PHP to Node/Express?
On the contrary, switching to the functional mindset, with something like Typelevel Scala3 and respective cats and cats-effect fs2 frameworks, helps to rethink a lot of designs and development approaches.
-
Next Steps for Rust in the Kernel
I think "better Haskell on JVM" (in contrast to "worse Haskell") is a good identity for Scala to have. (Please note that this is an intentional hyperbole.)
Of course, there are areas where Haskell is stronger than Scala (hint: modularity, crucial for good Software Engineering, is not one of them). And Scala has its own way of doing things, so just imitating Haskell won't work well.
Examples of this "better Haskell" are https://typelevel.org/cats-effect/ and https://zio.dev/ .
All together, Scala may be a better choice for you if you want to do Pure Functional Programming. And is definitely less risky (runs on JVM, Java libraries interop, IntelliJ, easy debugging, etc...).
None of the other languages you mentioned are viable in this sense (if also you want a powerful type system, which rules out Clojure).
I agree that Rust's identity is pretty clear: a modern language for use cases where only C or C++ could have been used before.
-
Java 19 Is Out
I would use Scala. I like FP and Scala comes with some awesome libraries for concurrent/async programming like Cats Effect or ZIO. Good choice for creating modern style micro-services to be run in the cloud (or even macro-services, Scala has a powerful module system, so it's made to handle large codebases).
https://typelevel.org/cats-effect/
The language, the community and customs are great. You don't have to worry about nulls, things are immutable by default, domain modelling with ADTs and patter matching is pure joy.
The tooling available is from good to great and Scala is big enough that there are good libraries for typical if not vast majority of stuff and Java libs as a reliable fallback.
-
Typelevel Native
What took my interest is this (for both JVM and future multithreaded Scala native): https://github.com/typelevel/cats-effect/discussions/3070 Having the same threads poll available IO events and execute callbacks should improve performance greatly
-
Scala isn't fun anymore
The author is the creator of Monix and implemented the first version of cats-effect. He knows what he is doing.
-
Question about some advanced types
You want Kernmantle, which quite honestly shouldn't be hard to implement around Cats and cats-effect. In particular, although Kernmantle doesn't require the use of the Arrow typeclass, there happen to be Arrow (actually ArrowChoice) instances for both Function1 from the standard library and Kleisli from Cats itself, given a Monad instance for the Kleilsi's F[_] type parameter. In other words, we should be able to port Kernmantle from Haskell to Scala (with the Typelevel ecosystem) and instantly be able to use pretty much anything else from the Typelevel ecosystem, or wrapped with it, in our workflow graphs. Pure functions, monadic functions, applicative functions, GADTs with hand-written interpreters, any of it. I think this would be eminently worth doing.
hn-search
-
We Need to Rewild the Internet
Sorry for the offtopicness, but trollish usernames aren't allowed on HN, so we've banned this account.
If you want to pick a different username, we can rename it for you and unban the account, as long as the username is genuinely neutral.
https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
-
T-Mobile Employees Across the Country Receive Cash Offers to Illegally Swap Sims
Lazier than you think! You almost nerdsniped me into seeing how fast I could whip up a crawler but then I checked the search and found out it can find comments and use a custom date range.
https://hn.algolia.com/?dateEnd=1700092800&dateRange=custom&...
-
A Teenager
We really do love pudding.cool[1]- I'd never bothered to go look at what it's actually all about till today, and you should too if you've not, because it wasn't exactly as I expected: https://pudding.cool/about/
[1]https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
-
Knuth–Morris–Pratt Illustrated
Is this post showing a bug in HN? It says it was posted 10 hours ago, but Algolia says it was posted 2 days ago
https://hn.algolia.com/?dateRange=pastWeek&page=0&prefix=tru...
And mehulashah's comment that the thread claims was posted 7 hours ago was also posted two days ago, according to Algolia
https://hn.algolia.com/?dateRange=pastWeek&page=0&prefix=tru...
-
Ramanujan's Lost Notebook
From https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu... it looks likethere are like 5 or 6 post per year.
-
Supabase – General Availability Week
hey hn, supabase ceo her
we just announced GA, after ~4 years of beta. for those who don't know: supabase is a postgres hosting company. we also host other open source "backend" tools that make it easy to get started with postgres (tools like PostgREST for auto-generate APIs [0])
we owe a lot to the HN community. you launched us 4 years ago [1], when we were just a few developers. since then HN has been a staple in our journey, one of the best sources of product feedback [2]
the GA badge is mostly to signify organizational readiness. we're at a stage where we can take any profile of customer. we have a support team that works 24/7, and a success team that will help customers improve their postgres usage. we released our Index Advisor [3] yesterday, and we'll be releasing a few more products this week that helps customer with performance and security.
on a personal note: i read HN most days, and love going through the ShowHN's to see what devs are building. thanks for being an awesome community and my favorite place to lurk on the internet. i'll stick around to answer any questions
[0] PostgREST: https://postgrest.org
[1] Launch: https://news.ycombinator.com/item?id=23319901
[2] HN journey: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...
[3] Index Advisor: https://news.ycombinator.com/item?id=40028111
- x86 and x86_64 software optimization resources
-
A Day in the Life of a Walmart Manager Who Makes $240k a Year
If there's a workaround, it's ok. Users usually post workarounds in the thread.
This is in the FAQ at https://news.ycombinator.com/newsfaq.html and there's more explanation here:
https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...
- Personal VPN Services are Snake-oil
-
I'm Peter Roberts, immigration attorney who does work for YC and startups. AMA
Hi Peter,
I have an offer to study a CS Masters in the US. I have two questions:
1) What are my options after my 3 year STEM OPT ends? Can you comment on the likelihood of being able to stay in the US after? Do I need to be working for a company capable of sponsoring me (e.g. FAANG)?
2) Let's say I don't do my Masters in the US – what is the process of getting a visa if I raise from a US VC?
Thank you for helping us all! :)
* For anyone wanting to search through Peter's past AMAs, this might be of interest: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
What are some alternatives?
ZIO - ZIO — A type-safe, composable library for async and concurrent programming in Scala
duckduckgo-locales - Translation files for <a href="https://duckduckgo.com"> </a>
FS2 - Compositional, streaming I/O library for Scala
v - Simple, fast, safe, compiled language for developing maintainable software. Compiles itself in <1s with zero library dependencies. Supports automatic C => V translation. https://vlang.io
fs2-grpc - gRPC implementation for FS2/cats-effect
parser - 📜 Extract meaningful content from the chaos of a web page
doobie-quill - Integration between Doobie and Quill libraries
readability - A standalone version of the readability lib
Kategory - Λrrow - Functional companion to Kotlin's Standard Library
yq - Command-line YAML, XML, TOML processor - jq wrapper for YAML/XML/TOML documents
Slick - Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
milkdown - 🍼 Plugin driven WYSIWYG markdown editor framework.