Clojure Q&A - Recent questions tagged require

Consider documenting usage of `do` for the Gilardi scenario

Sun, 13 Jul 2025 20:13:30 +0000

It is a relatively well-known fact that do, when used at the top level of a namespace, lifts its children to the top-level. Which makes it suitable for e.g. writing macros that emit code that requires some namespace and immediately uses it.

That behavior is relied upon by existing libraries and is described online in various places, but it's not documented at https://clojure.org.

Perhaps it makes sense to explicitly document this particular quirk of do and its usage.

Add requiring-resolve to ClojureScript

Tue, 25 Jul 2023 16:49:40 +0000

I'm not sure if there are any technical hurdles in adding requiring-resolve to ClojureScript, but it would be nice to have parity so REPL utilities can be written using it.

How to require a symbol from within a function?

Wed, 01 Jun 2022 10:59:51 +0000

Why can't I use require in a function like so?

(comment
  (->> [1 2]
       (reduce (fn [acc v]
                 (require '[clojure.set :as c-set])
                 (c-set/union acc #{v}))
               #{})) ;=> Syntax error compiling at (lab/sandbox_playground.clj:31:18).
                     ;   No such namespace: c-set
  )

At first I was thinking it was that require needs to go top-level. However: This does work:

(comment
  (do
    (require '[clojure.set :as c-set])
    (c-set/union #{1} #{2})) ;=> #{1 2}
  )

How to require an image

Tue, 30 Jul 2019 13:24:52 +0000

I am currently working on some hiccup components and they use different icons. Is there a way I can import them in the code?