how exactly are clojure values "copied" when for example assoc'd into a map?

Hello everyone! I'm trying to call a function with 4 pairs of arguments, and I'm looking for a more idiomatic way to do it than this:

(do-something "A" :a)
(do-something "B" :b)
(do-something "C" :c)
(do-something "D" :d)

I was looking into apply, but couldn't get it to work. Any suggestions?

can you show you would like it to look?

I think I just found my answer

doseq

I kind of want it to look something like

(<thing-im-looking-for> do-something ("A" :a "B" :b "C" :c "D" :d))

or

(<thing-im-looking-for> do-something [["A" :a] ["B" :b] ["C" :c] ["D" :d]])

but it looks like I should be able to do this:

(doseq [char ["A" "B" "C" "D"]
        key [:a :b :c :d]]
  (do-something char key))

wait, no

not what i want.

I got it (edited with @schmee's correction below):

(doseq [[char key] [["A" :a] ["B" :b] ["C" :c] ["D" :d]]]
  (do-something char key))

nice! should be an extra pair of brackets though:

(doseq [[char key] [["A" :a] ["B" :b] ["C" :c] ["D" :d]]]
  (do-something char key))

also, are you using this for something side effect-y or do you need the results of do-something?

yes, thanks. manual copy/paste fail

this is definitely side-effecty

it's setting up keyboard event listeners for Phaser 3

neat, then doseq is appropriate :thumbsup:

cool, thank you for the confirmation 🙂

hi everyone : struggling with vase here. I am using 'lein new vase service' to try the template out, but then if I follow the readme, 'lein repl' then (def srv (run-dev)) doesn't work, compiler saying it can't resolve run-dev in this context (I am in the right ns though!). What am I doing wrong?

What library or framework would you recommend for web scraping?¿

Im using selenium in java and want to "migrate" to clojure

Hi guys, I am learning clojure spec

Hi All, why is the first case false while second case is true?

Is it because quoting primitives is the same as the primitives themselves?

Like the following:

‘9 is the number 9, the latter is a symbol that prints as 9. Symbols are not equal to numbers.

Thanks Alex, apologies if it is a basic question but why is '9 the number 9?

‘ means read but don’t evaluate the next thing. 9 is read as the number 9

Numbers (like almost everything in Clojure) evaluates to itself though

Quoting is mostly only useful on the exceptions to that - symbols and lists

In evaluation, symbols do a lookup to what they refer to, lists invoke the first element using the rest as args

Okay, I guess I got it, every primitive is read as the primitive itself but if it is anything else it is a symbol

I mean after '

Well not everything, but mostly yes

Okay great! Thanks!

👋 what's a good book to learn clojurescript and functional paradigms in general?

Hi everyone! Is there a way in clojure to wait for a vector of promises and do something once all promises have returned?

@gerome.bochmann You could map eagerly with run!, mapv, (dorun (map ... )) or (doall (map ...)), calling deref on every promise. For example:

(run! deref promises)
;; Then <do something>

Cool! I’ve had a similar idea but wasn’t sure where to start. Thanks @petterik