msgilligan

This is really cool to see. Congratulations!

The existence of a project like this can lead to feedback that can improve other web frameworks and the JDK itself.

Found it: https://babylonbee.com/news/bad-luck-military-announces-lost...

... and I agree that there is a need for a Java 21+ book which includes discussion of algebraic data types, pattern matching etc.

And I would recommend "The Well-Grounded Java Developer" (2nd edition) to those who have mastered the functional-style Java of "Modern Java in Action". It covers JDK 17 (and beyond) and also has a a polyglot JVM focus with coverage of Kotlin and Clojure.

https://www.manning.com/books/the-well-grounded-java-develop...

Modern Java in Action (the 2nd edition of Java 9 in Action) covers Java 11 and contains a final chapter that talks about "future Java" features -- many of which are now implemented.

It's a great book for Java programmers who want to make the jump to functional-style programming. If that's the transition one is hoping to make, then I would definitely recommend the book.

Well hopefully it won't be mixed in _randomly_.

I have some use cases in mind and think it will be very helpful. I have been converting a 10+ year-old code base to modern, functional-style Java and believe that sealed types and pattern matching will help us further simplify our code and eliminate more usages of nullable values.

A challenge for us will be that we need the core library to stay on JDK 8 for a while. But, in general, I am finding that you can implement a JDK 8 library that works well with newer JDKs if you are careful (and willing to write more verbose code using the older syntax/libraries to support the newer paradigms)

It's a great post. Thank you for writing it!

The title of the blog post is IMO a poor choice. The (hidden) subtitle of the post is "Algebraic data types in Java" which is much more descriptive of the content. A better title would have been "Algebraic data types in Java 21".

Perhaps because of the title, many/most of the comments here are off-topic. I was hoping to see more discussion about algebraic data types, strengths and weaknesses of the Java implementation, technical comparisons to other languages, etc.

One thing about "gradually gaining features" is that the Java language architects do a very good job with backward-compatibility. This means that your application/library will be easier to migrate to newer versions of the language and you will continue to have a large number of 3rd-party libraries available. The Scala community is currently migrating to Scala 3 and many libraries have not been ported (Scala experts correct me if I'm wrong.) Kotlin also seems to be less stable at the API level than Java (but I may be wrong here, Kotlin experts please correct me.)

This backward-compatibility does comes with costs (e.g. non-reified generics)

Also, if you're a library developer and you want to create a JVM library that can be used by Scala, Kotlin, etc. developing in Java is often the best choice. For one thing it avoids any dependencies on the standard libraries of those other languages.

Disclaimer: I like Kotlin and Scala, but mostly use Java.

Manning's Modern Java in Action is outstanding. It assumes you already know basic Java.

https://www.manning.com/books/modern-java-in-action

I'm pretty sure this is not a valid Hayek quote. Hayek was not known for being unnecessarily confrontational (or pithy), so it doesn't sound like something Hayek would write or say to me.

I've searched for proper attribution and been unable to find it.

They can't do that to our pledges. Only we can do that to our pledges.

I had to double-check that, I thought it was 512 MB. Yeah, that's not very much.

I also recall that the final iOS version for that device (iOS 5.x or 5.1.1) left less memory for apps and I regretted agreeing to that upgrade.

I really wish I could install a minimal Linux and the best minimal browser available. That would at least be an improvement over the doorstop that I have.

Yeah, it’s really a shame. I have the original iPad and the hardware remains solid. If I could have an updated browser that could display modern websites without crashing, I would still use it.

They got him far. But eventually he flew too close to the sun.

I remember having beers with Bob at the Tied House in Mountain View (maybe 10-15 years ago) after some conference or meetup (perhaps at Google.) A friendly, humble guy who was a great human being and great developer.

Well, you do most of your compilation, test, and debug under the JVM and only do final test (and possibly debug) with native compilation.

The "And just like that" strongly hints that the change is "at the stroke of a pen" and not something real.

Guix is also both a package manager and a Linux distro:

> You can install GNU Guix on top of an existing GNU/Linux system where it complements the available tools without interference (see Installation), or you can use it as a standalone operating system distribution, Guix System2.

https://guix.gnu.org/en/manual/en/html_node/Introduction.htm...

Signal is (as far as I know) single-vendor, which they are confusingly calling “closed proprietary”

My understanding is that Rust provides memory safety with less overhead than languages that provide memory-safety via garbage collection. This comes at the price of some extra cognitive load for developers, but is appropriate for many applications where the added performance is needed.

(Not necessarily "better" overall, but a better choice for certain applications.)

C—- was the joking name for the subset of C we had to implement for my Compilers course in college (1990s, UCSC). I’ve assumed that other courses at other colleges did this, too.

When I clicked on the link this is what I expected the article to be about.

Somewhat related: There was an Open Source, Bitcoin-based, crowdfunding project (now defunct, I believe) created by Mike Hearn named "Lighthouse": https://news.bitcoin.com/an-old-mike-hearn-crowdfunding-proj...

Note: The link I provided above is for a later relaunch of the project on Bitcoin Cash.

Further thought: Maybe insurance companies could pay, reimburse, or reduce rates for those who can reliably prove they are exercising.

I’m not in the insurance industry and have no idea what the actual reason is.

And I don’t know what the statistics are, but a significant percentage of people with gym memberships rarely go to the gym. I suspect the percentage of people with free (i.e. payed for by insurance) insurance who rarely go would be much higher.

The iFixIt headline is actually "Apple’s Self-Repair Program Manages to Make MacBooks Seem Less Repairable".

The word _seem_ is important here. 9to5Mac should change their headline accordingly and so Hacker News should maybe change the link.

I’d you haven’t used a drill to attach a computer to a network, you can’t appreciate how easy things are these days…

It is now 11 and 17+4n

If the rules are regularly applied to persecute people over nonexistent offenses, they will very soon cease to matter.

Actually Project Valhalla is going to fix (well at least improve) this:

https://openjdk.java.net/projects/valhalla/