hello! how this translates to Clojurescript?

let response = await fetch('/article/fetch/post/user', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json;charset=utf-8'
  },
  body: JSON.stringify(user)
});

(def fe (js/fetch ""
                    #js {:method "POST"
                         :body "567985679865796579"
                         }))

how to check if value in map is a number or type of cljs.core.Delay ? will this work (if (= 'cljs.core.Delay (type val.....` ? the data I have prints into REPL like this {:hash_ #object[cljs.core.Delay {:status :pending, :val nil}], ...

Hello, The documentation of swap! functions states:

Atomically swaps the value of atom to be:
(apply f current-value-of-atom args)

cljs.user=> (def a (atom {:a 1 :b 2 :c 3}))
#'cljs.user/a
cljs.user=> (apply assoc @a [:a 24])
{:a 24, :b 2, :c 3}
cljs.user=> (swap! a assoc [:a 24])
{:a 1, :b 2, :c 3, [:a 24] nil, nil nil}

Oh, I see

So you've done (swap! a assoc [:a 24]), which transforms into (assoc @a [:a 24])

Remember that (apply assoc @a [:a 24]) becomes (assoc @a :a 24)

You may be thinking of assoc-in , which goes (assoc-in @a [:a] 24)

@victord args will be ([:a 24]) so its a seq of args

I've done a similar mistake in the past, and I've always wondered - where does the nil nil pair come from?

(apply assoc @a '([:a 24]))

Yeah, I meant - where does it come from when using apply assoc?

At a guess for some reason it's calling it with 3 additional undefined in the cljs?

It throws an exception clj side

Thanks for the answers, My original idea was to update multiple key/values at once with:

cljs.user=> (apply assoc {:a 1 :b 2 :c 3} [:a 24 :b 23])

You just want (swap! a apply assoc [:a 24]) ?

Wait no

swap! works exactly like apply in this sense. (swap! a assoc :a 24 :b 23) .

(swap! a (partial apply assoc) [:a 24])

I think that works

@p-himik that's true but i need my input to be a vec:[:a 24 :b 23]

Thanks Isenjov, (swap! a (partial apply assoc) [:a 24]) It works. I'm now considering to use a map instead 🙂 (swap! a merge {:a 24 :b 32})

I have an implementation namespace like lib.impl.foo that has some macros + runtime functions (it’s a .cljc file). in my lib.core namespace, I have a macro foo that emits a call to lib.impl.foo/bar-macro which emits a call to the lib.impl.foo/baz function. When I use the lib.core/foo in another namespace, I get a bunch of warnings about “Use of undeclared var lib.impl.foo/baz” This makes sense to me, since it’s emitting a bunch of calls to a namespace that doesn’t appear in that ns requires. However, I’m not sure how to solve this problem without moving everything in lib.impl.foo into lib.core Any ideas?

nevermind, the issue was that I had neglected to require the impl namespace in my CLJS lib.core ns