hey guys, anyone know the editor/ide David Nolen is using in this talk?

without knowing which talk, I'm gonna guess Cursive

oh whops my bad forgot the link heh https://www.youtube.com/watch?v=Rlu-X5AqWXw

looks like cursive

ok thanks guys

Given he is using nodejs, it could be atom

Oh okay, maybe its this https://atom.io/packages/proto-repl

Naw, the REPL is an unanchored window and has IntelliJ icons. That's probably Cursive.

It’s definitely Cursive

but all of the things he's doing can be done in any clojure supporting IDE that allows you to interact with the repl by sending code over: cursive, proto-repl, cider, lighttable, etc

Yep, I think that is one of the things I like about clojure and clojurescript - you are not locked into a specific tool chain. Nearly any editor of choice which supports a subprocess can be setup with a repl and the majority of them also support some form of 'overlay' which can provide temporary eval output in your code window

Ah ok thanks, new to clojure/script having some issues with sublime text and setting up a REPL so looking for an alternative

Which other editors are you familiar with and what is your main target (clojure, clojurescirpt, nodejs etc)?

I mainly just use sublime text for frontend and serverside javascript, looking to try out clojurescript

if you're just playing around with clojurescript to see what it's like, you might try http://nightcoders.net/ ; I've never actually used it before, but it's a web IDE for clojurescript that's all set up for you already

Thanks! thats pretty cool

Starting with clojurescript, just went through channel history. Found few libraries to work with, but can someone please share some other resources to get started with better setup, debugging or any other templating library and if possible please pin those resources to this channel, it would be really helpful, thanks

@mj Most people just choose their React wrapper like Reagent,Om,Rum (etc) and then start coding away. In a pretty large SPA I use only 3 libraries: Rum, Bidi, Datascript. Other functionality I need is all taken from Google Closure which ships with CLJS.

There is: https://github.com/hantuzun/awesome-clojurescript

rauh Cool, will go through it, thanks!

@mj fastest way to get started would probably be to use the chestnut template https://github.com/plexus/chestnut It provides you with most of the things that @rauh suggested, and is kept up-to-date by the maintainer

I’m deprecating the ClojureScript wiki, please direct all edits to the ClojureScript site, thanks https://github.com/clojure/clojurescript-site

I would like to create a type that behaves exactly like a regular cljs vector but with some additional protocol implementations. What is the best way to go for doing so?

you can safely extend instances with specify

so you could make a new constructor

(defn my-vec [] (specify [] …))

specify is just like reify in usage beyond the first argument being the thing you want to extend

ok I see, I will try that, thank you

And if I want a new concrete type that inherits from vector? is there a straightforward way or am I supposed to do a big deftype?

if so, how can I know all the protocols to implement?

in clojure I use this function from “programming clojure”

(defn scaffold
  "Given an interface, returns a 'hollow' body suitable for use with `deftype`."
  [interface]
  (doseq [[iface methods]
          (->> interface
               .getMethods
               (map #(vector (.getName (.getDeclaringClass %))
                             (symbol (.getName %))
                             (count (.getParameterTypes %))))
               (group-by first))]
    (println (str " " iface))
    (doseq [[_ name argcount] methods]
      (println (str " " (list name (into '[this] (take argcount (repeatedly gensym)))))))))

@pbaille won’t work

there’s no way to do anything like that

you either need wrap vector or use specify

you mean wrap vector in a deftype?

that’s what i’m planning to do but I don’t know exactly what protocol to implement.

I’m saying there’s nothing easy here

you have to go study persistent vector and implement everything

the fact that it is challenging is not a problem

since we don’t care that this is hard to do

may I ask why 🙂 ?

why we don’t care? we just don't

ok I see 🙂

thank you for all I will dive into PersistentVector

the amount of value to be gained from making it easy doesn’t outweigh the time wasted on doing something few people will ever use

that and I don’t want to make it easy

so there’s little point on working on it 🙂

ok that’s clear

are there any examples out there where published es6 components(those that extend React.Component) have been used in reagent/re-frame. I am having a really difficult time finding one. Without this I'd just be forced into using the traditional javascript to build the app which i really dont want to do.

@rohit_ you can try the #re-frame channel - they are a bit more focused on the specifics of your question

thanks

I’m trying to write a macro that yields different code depending on if it’s called from clj or cljs. how can i do this correctly within a cljc file?

@pbaille (boolean (:ns &env)) returns true when compiled in cljs

@pbaille

https://github.com/plumatic/schema/blob/master/src/clj/schema/macros.clj#L10-L19

@moxaj @jr thanks!

namespaced maps haven’t landed in clojurescript yet have they? I’m getting errors on latest when I try

literals should work, but not reader support

hm. I’m using version "1.9.293"

Woah, I didn’t even know about namespaced maps

@uwo please share if you have something minimal to repro your errors

and I get this error adzerk.boot_cljs.util.proxy$clojure.lang.ExceptionInfo$ff19274a: Reader tag must be a symbol when trying something like #::dropdown-panel{:help-text "hidiho"}

right. I suppose I should go make a bare cljs repo. sorry to bother

I see. my example is using a reader

thx!

@uwo doesn't seem like a bug

in your example ::dropdown-panel should be an alias for another namespace

otherwise you should use #:dropdown-panel {:help-text "hidiho"}

correct. that alias exists in the namespace in which its used

oh hrm

@uwo in any case this works for me:

Lumo 1.0.0
ClojureScript 1.9.293
 Docs: (doc function-name-here)
 Exit: Control+D or :cljs/quit or exit

cljs.user=> (require '[clojure.string :as str])
nil
cljs.user=> #::str{:name "asd"}
{:clojure.string/name "asd"}
cljs.user=>

Given there's no alter-var-root, is there a way to rebind a var from another namespace?

(I know how terrible that question sounds…)

bindings

@jr What's that?

https://clojuredocs.org/clojure.core/binding

Oh, binding

No, not dynamic binding

yeah my bad

Actually mutating the var

why do that?

I need to tweak some things in my devcards environment

Specifically, we have feature flags I need to fiddle with

It's not a great situation, but I'd rather not drop everything to rearchitect our feature flag system right now just to add a devcard 🙂

in dev mode you can simply go and change it using javascript interop, no?

@peeja hrm... (set! my.ns/foo 42)?

Yeah, that might be the thing to do

or (aset js/my_ns “my_var" 42)

Oh, right

set! actually pretty nice here

Thanks!

ClojureScript 1.9.454 release is imminent 🙂

well assuming build box issues get sorted, heh

😄

Looks like a game-changer, especially for newcomers to CLJS ecosystem, awesome way to kick off the new year! Can’t wait to give the CommonJS module support a spin.

it’s a work in progress for sure

but lots of potential

Have to start somewhere! Congrats on cutting a release.

( JS module ecosystem craziness doesn’t make the job particularly easy 😛 Have your work cut out for you.)

fortunately once again we mostly get to take advantage of the fact that somebody else had this problem before us

anyone who uses cljs-devtools, when you have a breakpoint (say I placed (js* “debugger;”) somewhere). it stops. now when I type n Chrome Dev console - intellisense works extremely slow and kinda jittering. Is there a way to fix that? annoying me badly

ClojureScript 1.9.456 is released https://groups.google.com/d/msg/clojurescript/wGJeG36GPTk/e9XCo3a2BgAJ

https://clojurescript.org/guides/javascript-modules

https://clojurescript.org/guides/externs

it takes a while for the JAR to be available in Maven Central, right?

like 30 min or something?

Right. I haven’t seen the JAR appear either. It can take a while.

never longer than 30 but yeah there’s a delay

try the guides! I’m sure there are bugs etc.

also around JavaScript modules support looking for ideas on how to make it simpler - I’ve implemented the obvious fundamental helpers

but not against some reasonable config option sugar to make it more declarative

@dnolen 1 question I just thought about: can we consume CLJSJS modules just for externs?

I think the answer is "no" given the way they're currently packaged

@anmonteiro the answer is “yes"

we blindly collect externs

oh..!

we don’t look for specific ones on the classpath

so we can have a CLJSJS dep in the classpath and just not require it in our code?

that’s how the last part of JS modules guide works

that’s right

awesome. OK I should go RTFM and report back. sorry for the noise

in fact far as I can tell we will need CLJSJS for some time

Closure compilation will rename internal dynamic stuff - the only way to prevent that is community maintained externs

in fact some externs aren’t supplied and I had to hand code those + pull in some Node.js stuff

but people can figure out what’s working and what’s not

did anything change at all wrt to advance compiling for :target :nodejs?

the good news is that it seems very practical to compile from node_modules

React is a non-trivial thing to build

@anmonteiro nothing should have changed for advanced compiling :nodejs

all the changes for Node.js were dev time stuff

loading namespaces on the fly

@dnolen just saw your es6-demo branch for React

that’s in the guide now

makes sense you got it to work under advanced compilation, but you'll have a much harder time getting Maria's circle project to work

@anmonteiro right but the circle project is harder for now obsolete reasons

trying to mix foreign lib with CommonJS

now you can just do CommonJS no old style foreign lib

in any case, I think some form of these should be added to React externs: https://github.com/anmonteiro/om/blob/2a54bd9e02ea4332530b68bb8cd2107a1ce85c53/src/main/om/externs.js#L1858-L1929

you have the first part in your es6-demo project

with the others I got React to work under advanced

(both Circle + the Om Next devcards worked great with those)

right yep

but those should get pushed to CLJSJS

perhaps I shouldn't be lobbying this to you, but to CLJSJS 🙂

exactly

^ cc @juhoteperi

Super excited about this add! Been avoiding a number of js libs that I'd like to use waiting for this!

BTW the CLJS 1.9.456 artifact is now in Maven

@anmonteiro No lobbying necessary, just make PR with a short description about what those are used by

Sure, I didn't mean it like that 🙂

just that it needed to be brought up

hm, i get runtime errors like this with the newest cljs compiler that I don't get with the previous version:

Invalid Om component fn, app$ui$views$root$render_app does not return valid instance
(or (satisfies? IRender x) (satisfies? IRenderProps x) (satisfies? IRenderState x))