clojure - lib names inside prefix lists must not contain periods -


i learning clojure now, wrote file this:

;; file ./mycode/myvoc.clj  (ns mycode.myvoc     (:use 'clojure.java.io)     (:import (java.io.file)))  ; more code here...

this file resides in ./mycode/, when run repl, wanna use function in myvoc.clj, this:

user=> (use 'mycode.myvoc) java.lang.exception: lib names inside prefix lists must not contain periods (myv oc.clj:1)

i don't know why. if change myvoc.clj :

(ns mycode.myvoc) ;    (:use 'clojure.java.io) ;    (:import (java.io.file)))

it'll ok report no "reader in context" commented import part.

could fix this? alse use require same kind of error.

you need remove quote :use clause:

(ns mycode.myvoc   (:use clojure.java.io)  ; note no '   (:import java.io.file)) ; parens removed here; no harm,                           ; though

'clojure.java.io shorthand (quote clojure.java.io), original :use clause was

(:use (quote clojure.java.io))

this looks if trying :use namespace prefix of quote , final segment clojure.java.io. dots in latter direct cause of error point of view of ns.

incidentally, it's more usual (:require [clojure.java.io :as io]) , io/file, io/reader etc. pull in entire namespace.

finally, clear, quote necessary when using function use (like in (use 'mycode.myvoc) call), opposed :use clause in ns declaration.


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