Odd bug in the reader in [org.clojure/clojurescript "1.10.339"]

(rdr/read-string "01") ; valid
...
(rdr/read-string "07") ; valid
(rdr/read-string "08") ; error
(rdr/read-string "09") ; error

only "08" and "09" cause an invalid number error

that rdr is cljs.reader

And as expected I see this also when entering 08 or 09 vs 01 etc in the cljs repl

I've narrowed it down to cljs.tools.reader.impl.commons/match-number

cljs.tools.reader.impl.commons=> (match-number "09")
nil
cljs.tools.reader.impl.commons=> (match-number "07")
7

@rplevy not a bug, same behaviour in clj. number starting with 0 is read as octal

oh! interesting

I never new that

How do I get the data back from a js/Error? It looks like data in the REPL, but it comes back as a string when using .-message

cljs.user=> (js/Error. {:foo 42})
#object[Error Error: {:foo 42}]
cljs.user=> (.-message *1)
"{:foo 42}"

@grav use (throw (ex-info "msg" {:foo 42})) and ex-data

js/Error will call .toString and does not support data

That’s what I’m using now - just seems a bit tedious. Ok. How does the repl display it as data? Does it just guess that it might be clj data?

Or maybe it is just how it displays strings … that’s probably what threw me off

nah just seems buggy printer for error given that the Error: isn't a string either

cljs.user=> (js/Error. "hello")
#object[Error Error: hello]

is (enable-console-print!) needed these days ?

Yeah

@octo221 no it is not

cheers

(`enable-console-print!` became unnecessary with 1.10 when cljs.main was introduced)

I'm looking for a library for nested data manipulation, and I saw a recommendation from a couple years ago of specter. Has anything changed since then, i.e., better alternatives that I should learn instead?

Specter is still the most recomended thing I see outside of using core functions.

Thank you

I’d really like something like jq but for edn 🙂

https://github.com/clumsyjedi/clack

Greetings! I've been browsing the last couple hours, trying to find out how I'd like to proceed with building a side-project webapp using mostly Clojurescript. I come from the Rails world. I couldn't find anything based on the plain old template-file architecture, i.e. the 20 years old approach of serving slightly tweaked HTML documents, possibly with a sprinkling of Javascript to enhance UX. I'm now under the impression that should I want to commit to Clojurescript for my side-project webapp, I better embrace either Om, Reframe, or some other Reacty thing, just to publish a bunch of largely static pages. Is that impression correct ?

For static sites there’s https://www.staticgen.com/

3 options for Clojure

@zor: you can definitely render some simple static documents without om, reframe or react. We generate some simple static pages on the server using https://github.com/weavejester/hiccup

I see your point, if it's mostly static, just don't do a backend (staticgen). Or plain hiccup to generate the static pages, appropriate caching strategies left as an exercise to the reader.

Are there alternative templating systems to Hiccup, using archaic architecture, (like erb, smarty, moustache, ...). I imagine usage would run like (render-template template_string bindings). (I won't answer the "Why would you want that?" question until someone asks for it 😉 )

Never used it myself, but: https://github.com/fotoetienne/cljstache

:thumbsup: Thanks for the pointer! It is indeed what I was looking for!

Now the beer_value_in_cents question is : anyone know of cljstache alternatives (outside hiccup, and that doesn't aim at building SPAs) ? 🙂

@zor check section “HTML Generation” https://www.clojure-toolbox.com/

And also “Template Languages” section

amazing! thanks a lot valtteri

No problem! As you can see most of the static generators seem to be for clj. It’s more common to build backend with clj and frontend with cljs. Code can be shared between the two, which is a huge benefit. If you don’t find a cljs or clj lib suitable for your needs,you can use libraries from node/js and jvm ecosystems via interop.