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• A post from Arne Brasseur about some changes for how Lambda Island makes videos. Making changes like this can be tough, but it seems like this is going to be more sustainable.

Libraries & Books.

• re-frame-flow helps you visualise a chain re-frame events.
• Methodical is a replacement for Clojure’s multimethods. It adds some neat features from the Common Lisp Object System, like adding wrapper methods, and the ability to call the next most specific method (kinda like calling a “superclass” but against the multimethod hierarchy). 0.12.0 is out now.
• recife is a library for running TLC/TLA+ models for model checking.

Foundations.

• OpenJDK has a new project Lilliput. The goal is to explore reducing Java’s object header size (in Hotspot) from 128 bits to 64 bits or less. As you can imagine, if succesulf, this would have a substantial impact on Java’s memory footprint.

Tools.

• A patch for adding Clojure language support to Git’s diffs. You can add this yourself to your own Git config, but it’ll be nice to have it built-in.
• A syntactic differ for Scheme. Similar to the excellent but underused autochrome.

Recent Developments.

• Tsutomu Yano posted a new patch to support automatic lambda conversions for IFns.
• Modern JS with CLJS: class and template literals

Learning

• Better performance with Java arrays in Clojure - a 125x speedup using areduce over Java arrays.
• An interesting proposal for a web app architecture. The server would send DOM updates over a websocket to the client (similar to Phoenix LiveView). See more discussion on ClojureVerse.

Misc.

Colin Fleming shared this to the Clojure subreddit - A strong commitment to backwards compatibility means keeping your mistakes

I’m Daniel Compton. I maintain public Maven repositories at Clojars, private ones at Deps, and help fund OSS Clojure projects (along with tons of generous members like Latacora, Roam, Pitch, Nubank, Cisco, JUXT, Metosin, Solita, Adgoji, Nextjournal, Flexiana, Toyokumo, Griffin, and [Parkside][parkside]) at Clojurists Together. If you’ve enjoyed reading this, tell your friends to sign up at therepl.net, or post a link in your company chatroom. If you’ve seen (or published) a blog post, library, or anything else Clojure/JVM related please reply to this to let me know about it.

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Thanks!