What does the extension .cljc tend to mean?

Hi everyone

is there a way to indent and lint the clojure code which read from stdin and write to stdout ?

@abdullahibra have you tried joker? https://github.com/candid82/joker#linter-mode

@nxtk seems interesting, but how can i do indentation read from stdin -> stdout ?

maybe i can skip linter for now

@abdullahibra then look at https://github.com/weavejester/cljfmt/

Hi. How do you actually deploy a Ring app on a server? In other words, how to deploy an uberjar.

I am struggling a bit with the anonymous functions. I am trying to make two identical functions, the one with # works, but the one using the longer notation lambda (fn) doesnt.

(defn inc-maker
  "Create a custom incrementor"
  [inc-by]
  #(+ % inc-by))

(defn inc-maker2 “Create a custom incrementor” [inc-by] (fn (+ inc-by)))

you did not tell the longer form about its arguments

(defn inc-maker2 
  "Create a custom incrementor"
  [inc-by]
  (fn [inc-by] (+ inc-by)))

Thanks, that one works.

no

see, you want to have a function that accepts an argument x and increments it by inc-by

in your short form, your x is %

in your long form you have nothing to do the same job as % in your short form, get it?

and, inc-by is the argument to inc-maker2 function, not to your resulting function

Hey, I just trying out the re-frame templete with cider. Did lein new re-frame yeah +cider and tried to jack in, but got the following error

Execution error (ExceptionInfo) at shadow.cljs.devtools.server.runtime/get-instance! (runtime.clj:11).
missing instance

cider-jack-in-cljs btw

it worked fine for me. Did you get an option for which build to use and you chose app?

also, this project has two build systems. I saw that in lein it just calls out to shadow so when CIDER asks me which build it should use i just said shadow

@dpsutton yes did that

and you're receiving that error message after choosing shadow and then app as the build?

cider somehow infers that it's shadow so only asks me for the build type

yeah. in the dir-locals file it sets the preferred build tool

nevermind now I see what you meant, I thought you meant the CLJS repl type. That was actually the error.

In figwheel you still choose lein

Wasn't used to that

thanks

awesome! glad its working

Hello, I'm messing around with deftype and wondering if it's possible to create a variable that all the methods will have access to. Basically I'd like it to look something like this:

(deftype ManagementApi [endpoint]
  ManagementApiProtocol
  ;; (let [api (make-api endpoint)]
  (get-connection [this params]
    ;; Do something with the outer api
  )
  (delete-connection [this params]
    ;; Do something with the outer api
  )

i don't believe so. What you can do is pass that in and make a function that takes the endpoint and returns the deftype with both items bound. Ie, (defn management-api [endpoint] (->ManagementApi endpoint (make-api endpoint)))

Ahhh, that would be a good approach. Much more functional 🙂 Thanks @dpsutton!

I have a somewhat conceptual question. So I come mostly from a Ruby background where a lot of ORMs are available. As far as I noticed, Clojurians do not seem to like ORMs. So how do you structure your persistency logic then? Do you just write specialized SQL queries for each API request? Do you have open source examples how you structure your database logic where there are more than one or two tables?

Or is it possible to have a somewhat generic set of functions which you use to build the persistency logic? When I try thinking about how this could be achieved, it seems really hard e.g. when it comes to joining tables or other complex queries

@christian.paling For basic CRUD, you can just read and write hash maps, and update/delete by example (using a hash map) against the database using next.jdbc (or clojure.java.jdbc or a few others). For more than simple CRUD, you can either write the SQL (and use any of those JDBC wrappers) or you can look to some of the DSLs out there like HoneySQL, Walkable, etc.

https://cljdoc.org/d/seancorfield/next.jdbc/1.0.13/doc/getting-started and https://cljdoc.org/d/seancorfield/next.jdbc/1.0.13/doc/getting-started/friendly-sql-functions will give you an overview of how most folks work with JDBC in Clojure