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Last active May 4, 2018 08:49
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How to get *ns* string in ClojureScript
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cljs-ns.adoc

How to get *ns* string in ClojureScript

It’s not so easy to get *ns* string in ClojureScript as you might expect but here is a tip.

It is impossible to get *ns* string at run-time in ClojureScript (except in self-hosted ClojureScript) but it can be accessed at compile-time only. So you have to use a macro to get it as the following example.

I came up with this idea in the course of implementing set-ns-blacklist! and set-ns-whitelist! (https://github.com/philoskim/debux#debux-config) in my debux library.

example/macro.clj
(ns example.macro)

(defmacro current-ns []
  (str *ns*))
example/lab.cljs
(ns example.lab
  (:require-macros [example.macro :refer [current-ns]]))

(current-ns)
; => "example.lab"
@didibus
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didibus commented May 4, 2018

Cool macro.

I also realized you can use ::. So something like:

(->> (clojure.string/split ::test #"/") first (drop 1) (clojure.string/join))

Also works, and does not require the use of a macro.

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