Notes

This week’s newsletter is a bit late because I’ve been working on getting re-frame-10x 0.3.1 out the door. It’s got some very cool new features, check it out if you use re-frame.

-main

• clojure.org has a new guide on higher order functions
• Fly over Amsterdam with ClojureScript
• Ethereum’s Compact Merkle Trie in Clojure (Part I, Part II)
• I was interviewed on the Cognicast about Clojurists Together, this newsletter, Deps, and re-frame-10x.

Libraries & Books.

• Walkable is a new library that lets you make SQL queries using Datomic pull syntax and define your schema in EDN.
• Schematic is a new library for configuring Components. I’m loving the open source stuff coming out of Walmart Labs.
• Do some fastmath with Java primitives
• tea-time is a new task scheduler library from Kyle Kingsbury, taken from Riemann

People are worried about Types. ?

• Ambrose Bonnaire-Sergeant on creating Automatic Annotation Tools
• Gary Bernhardt with a clear discussion of Types for anyone who knows a programming language.
• CLJ-2271 would enable Expound’s experimental macro errors to look even better. 

Tools.

• Datomic had a remote code execution bug for people running dev or free storage. If you haven’t already, you should update ASAP.
• Lumo - Brightening the horizon for ClojureScript
• Command line scripting with ClojureScript
• Edge is a great sample project from JUXT to get you up and running with a full Clojure app without weeks of work. Malcolm Sparks has a new talk about Edge and the new generation of Clojure tooling.
• Optimized Optimus Asset Paths from ClojureScript
• Parallelizing a ClojureScript test suite
• Calva: Clojure for Visual Studio Code
• Such a genius idea, test-reporting (also from Walmart Labs) lets you see more context about a test failure. I’ve come up with various workarounds to get more context when assertions fail, but this looks like a much better option.

Recent Developments.

• Hints about prepl keep dropping
• The new CLJS Shared AOT cache will speed things up compilation times, but before you turn it on, check that your dependencies macro expansions are cachable. This means not reaching out to the environment or ClojureScript build config (other than through Closure defines). 

Learning.

• Learning kee-frame in 5 minutes, and putting the URL in charge
• Transducer composition
• 7 Falsehoods Programmers Believe about Time & Place from Clojure SYNC

Misc.

• Learn this one weird destructuring trick, and a bunch more