@plexus nice blog: https://lambdaisland.com/blog/2019-12-09-advent-of-parens-9-dynamic-vars-clojurescript Note that CLJS sci is more consistent with JVM Clojure 😉

cljs.user=> (sci/with-out-str (sci/eval-string "(def ^:dynamic x 1) (push-thread-bindings {#'x 2}) (prn x) (pop-thread-bindings)"))
"2\n"

there's also an unbound var in CLJS sci:

cljs.user=> (sci/eval-string "(def ^:dynamic x) x")
#object[sci.impl.vars.SciUnbound]

good to know!

in practice it's a bit trivial though, there's still only one thread in CLJS

Here's the implementation: https://github.com/borkdude/sci/blob/master/src/sci/impl/vars.cljc

I started with the CLJS implementation and then made it work like CLJ

This was just merged to master last weekend

re: dynamically loading - here's what seems like an official reason: https://github.com/oracle/graal/blob/master/substratevm/LIMITATIONS.md#dynamic-class-loading--unloading

I can see their arguments for "the" JVM classpath. But I'm not using that. I'm just creating a one-off URLClassLoader to detect some files in some .jar files.

and that should imo just work, but whatever, I'm not going to argue with them and will just roll my own thing

what you say makes sense -- what they don't support is dynamic "class" loading. you want to load things that are not classes, right?

yes, I just want to detect a file in a collection of .jar files

i think i'll comment on that issue

thanks