you can read more here: https://github.com/zealdocs/zeal/issues/170#issuecomment-71310603

apparently there is a feed now, I am going to try it right away https://github.com/zealdocs/zeal/issues/170#issuecomment-269930023

@ejelome tried it and it works, just paste http://zealusercontributions.herokuapp.com/docsets/ClojureScript.xml in Add Feed

I’m trying to receive a request using cljs-http. While running my tests with lein doo phantom, I receive a -1 status and an empty string as the body. However, when I run the test in the repl, I am able to retrieve the request data. Is this because a channel is being returned first? Or maybe I need to implement a timeout to wait for the request to complete?

there are some problems with using js/isNaN to check for NaN - http://adripofjavascript.com/blog/drips/the-problem-with-testing-for-nan-in-javascript.html

the recommended approach in js is to check foo === foo, can i rely on the same behaviour in cljs? i.e. (= foo foo)

a quick noodle in the cljs repl says this should be ok

but are there edge cases i might need to consider?

@thedavidmeister you can use (== foo foo)

== is for numbers

oh ok

i didn't know about that one

cljs.user=> (== NaN NaN)
false
cljs.user=> (def foo NaN)
#'cljs.user/foo
cljs.user=> (== foo foo)
false

oh actually looks really useful

i've had to do some weird juggling of number types in the past because i didn't know about this

thanks 🙂

What interface do I have to implement in order to destructure HTMLCollection?

@bones ISeq IIRC

Hrm, I Implemented ISeqable, which enabled me to use “first” and “second”

But I really wanted to do [a b] (dom/getChildren switch) type thing

But when I try that I get “nth not supported”, so I’m trying to implement IIndexed

But now I get TypeError: coll.cljs$core$IIndexed$_nth$arity$3 is not a function

my implementation is `IIndexed (-nth [array i] (get (array-seq array) i)))`

@bones did you implement ISeq though?

https://github.com/clojure/clojurescript/blob/master/src/main/cljs/cljs/core.cljs#L516

`(extend-type js/HTMLCollection ISeqable (-seq [array] (array-seq array 0)) IIndexed (-nth [array i] (get (array-seq array) i)))`

I don't see ISeq

Do i still need ISeq atop ISeqable?

is that for next more and so on?

seems to be what destructure checks for... https://github.com/clojure/clojurescript/blob/master/src/main/clojure/cljs/core.cljc#L658

Should I be able to look up protocols from the REPL?

to see what they need?

like (doc IIndexed) ?

sure

cljs.user=> (doc ISeq)
-------------------------
cljs.core/ISeq
Protocol
  Protocol for collections to provide access to their items as sequences.

  -first
  ([coll])
  Returns the first item in the collection coll. Used by cljs.core/first.

  -rest
  ([coll])
  Returns a new collection of coll without the first item. It should
     always return a seq, e.g.
     (rest []) => ()
     (rest nil) => ()
nil

^ this is in Lumo

works in a normal (JVM) CLJS REPL too

Hrm, okay, I had to use find-doc “ISeq”

thanks for your help

awesome! thanks @richiardiandrea 🙂 https://clojurians.slack.com/archives/clojurescript/p1485907215014542

when compiling clojurescript to .js files, how can I force macro namespaces to be compiled to .js files too? This is to then use the $macros.js with self hosting

@tomaas are you using CORS? sounds like your preflight route also requires the x-access-token and x-key headers

We are building a couple of apps and parts will be common - panels / backend calls etc. is there anything I can read or any pointers on how to structure such a thing

https://clojure.org/reference/datatypes - deftype and defrecord dynamically generate compiled bytecode for a named class

what does that even mean??

i feel that this page is talking about Java, not clojure

is there a clojure version?

@ashnur many things just got copied over from Clojure, feel free to send PRs with corrections

you just need to have submitted your CA

again, asking the newbie to do the work of the pros

@ashnur you linked the clojure related stuff, I don't see the problem

moxaj i don't even know which documentation to use

trying to figure out how to use protocols

@ashnur regarding your question, deftype and defrecord generate actual java classes

@ashnur I believe the description you linked to is saying that, under the hood, deftype and defrecord are building what java would call a class

or technically “the same bytecode that would have been generated by a Java class"

also, "again, asking the newbie to do the work of the pros" -- i'm sorry?

moxaj every time i ask something sooner or later i am told that i should write the docs

no wonder the docs suck if the newbies are writing it, is my usual reply, i don't see the logic behind the concept

first off, this is the clojurescript channel, so @dnolen assumed you've found something that was incorrectly ported over from the clojure docs

@moxaj, and i used the clojure docs because i did not found clojurescript specific documentation about defprotocol or protocols

also, i watched this, but it only tells half the story https://vimeo.com/11236603

@ashnur oh sorry I missed you were talking about http://clojure.org

@ashnur what are you looking for specifically? most of the deftype docs for Clojure apply to ClojureScript

we could make a page for ClojureScript specifically about the small differences + document specify

someone should do that - and anyone can, not suggesting it should be you @ashnur

@dnolen i am just trying to understand how protocols can be used, i have to implement a graph lib and i would like to do it nicely

@dnolen I get WARNING: Cannot infer target type in expression (. Foo -prototype) ... for a simple (defrecord Foo []), I assume this is not intended? This seems like it should be common enough, but I don't see a jira ticket.

@ashnur I have seen a lot of references to http://www.braveclojure.com/multimethods-records-protocols/#Protocols

(to learn about protocols)

i tried to read that book so many times, but it's not for me

anyway, will try to read again, at least that part

@moxaj a minor ticket yes

what we currently have wasn’t designed to mix interop nses with normal nses

@dnolen just to clarify, you mean there's a minor ticket already (which I can't find), or that i'm free to file one?

@moxaj file one

@dnolen is there a way to get the closure compiler to compile all macro namespaces for use with self hosting? So that you can have load-fn use a .js and cache file for macros instead of clj/cljc sources?

@thegeez perhaps - but we’re not changing anything around self-hosting

@thegeez hrm, I don’t really understand what you’re asking for - mislead here by your mention of Closure Compiler

I’m pretty sure you can compile macro nses into js and cache files

@mfikes could confirm

hmm yes, I should have said clojurescript compiler

I mean when cljs.js is required, then core$macros.js is generated. I was hoping there was a way to get all macro namespaces to be generated as such

@thegeez You can, as an AOT step, require macros namespaces and then cache the results. This is in fact what Planck and Lumo do for certain namespaces so that they can subsequently be required w/o actually having to convert them to JS. More info is here http://blog.fikesfarm.com/posts/2016-02-03-planck-macros-aot.html

@mfikes thanks, I'll try going down that route

ok, so now i understand the syntax (i think) but i have this issue that i can't see the difference between the protocol and the record. I both want them named Graph

what am i missing still?

like, i want a graph lib that has methods such as erdos-renyi or watss-strogatz that generate random graphs

@ashnur it is fairly common to prefix the protocol with an I to indicate what would be an interface in java. ie. (defprotocol IGraph ...) and (defrecord Graph ...)

ok, so by convention i should just put an I in front of the protocols name so i can have IGraph protocol and Graph record

yes

i never used interfaces, not in java not elsewhere, so that part i don't know

people use all sorts of naming but the I version is most common I think. clojure and cljs do that all over the place

i see, thanks

How might one get the data attribute from the DOM? I keep seeing record-id = null.

@nrako that is an attribute, so (-> target (.getAttribute "data-record-id")) should work

It does indeed work. Many thanks...

depending on the browser you can do (.. target -dataset -dataRecordId) but getAttribute is safer

also that won't survive advanced comp

so stick with attribute 😉

In lumo, should I use (.-argv js/process) to get the command line args?

@borkdude depends

there's also lumo.core/*command-line-args*

@anmonteiro is that available from a script?

yeah

but depends on what you want

*command-line-args* works like clojure.main

@anmonteiro I get this: WARNING: No such namespace: lumo.core, could not locate lumo/core.cljs, lumo/core.cljc, or Closure namespace "" at line 3 W

need more info

Lumo version, did you require lumo.core?

Ah, that’s it 🙂

@anmonteiro Should the cache work if I run lumo only with a script?

What do you mean? Can you paste the command you're running?

@anmonteiro I mean, say you have a file script.cljs with only (println “foo”) and you call it with lumo -K script.cljs

@anmonteiro should this compile anything into the cache

Probably not

Only of you require stuff

@anmonteiro this is my script now: https://gist.github.com/borkdude/a6a87796dfe26218a5e9164a84545790 I call it with ./node_modules/lumo-cljs/bin/lumo -K script.cljs <some-file>, but the cache stays empty. Maybe lumo only caches compiled things from the “init path” or “class path". But with the -i option I couldn’t pass a command line arg.

@borkdude: I'm busy right now, but feel free to open an issue with an example that I can look at later

@anmonteiro ok, I will and thanks!

I’ve been trying to use Leiningen and Stuart's "Clojure Reloaded" workflow so I got a file user.clj on my source path that transitively requires a couple of Java classes in my project and despite some efforts I keep stumbling upon ClassNotFoundException. It appears to be reported in some issues (e.g. https://github.com/technomancy/leiningen/issues/1245) but unfortunately there are no well-known solutions 😕 How have you guys deal with this?

@piotr2b might want to also try #clojure for that particular question

Good idea, thanks! https://clojurians.slack.com/archives/clojure/p1485985651017834

is there any JS or CLJS library for GraphQL which could be used from CLJS out-of-the-box?

does anyone know a cljs lib that has a deep merge fn for maps?

@michael.heuberger Like merge-with but deeper?

yes, like https://crossclj.info/ns/org.clojure/clojure-contrib/1.2.0/clojure.contrib.map-utils.html#_deep-merge-with

but hasnt been ported yet

That one seems to work just fine in ClojureScript

(Assuming you copy it.)

yeah, could do but dont want to copy/reinvent or so if possible