Clojurians Log v2

What is wrong here :

(ns tracks-on-tracks-on-tracks)

(defn new-list
  "Creates an empty list of languages to practice."
  []
  ())

(defn add-language
  "Adds a language to the list."
  [lang lang-list]
  (conj lang lang-list))

(defn first-language
  "Returns the first language on the list."
  [lang-list]
  (lang-list first))

(defn remove-language
  "Removes the the last language added to the list."
  [lang-list]
  (rest lang-list))

(defn count-languages
  "Returns the total number of languages on the list."
  [lang-list]
  (count lang-list))

(defn learning-list
  "Creates an empty list, adds Clojure and Lisp, removes Lisp, adds
  Java and JavaScript, then finally returns a count of the total number
  of languages."
  []
  (count-languages(add-language "Javascript"(add-language "Java"(remove-language (add-language "Lisp"(add-language "Clojure"(new-list))))))))


(learning-list)

the test-runner says all test are green but I cannot submit. so I think there is somewhere a syntax error which the test-runner does not display

When I try your solution locally, I get the following error:

{
  "version": 2,
  "status": "error",
  "message": "----- Error --------------------------------------------------------------------\nType:     java.lang.ClassCastException\nMessage:  java.lang.String cannot be cast to clojure.lang.IPersistentCollection\nLocation: /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:11:3\n\n----- Context ------------------------------------------------------------------\n 7: \n 8: (defn add-language\n 9:   \"Adds a language to the list.\"\n10:   [lang lang-list]\n11:   (conj lang lang-list))\n      ^--- java.lang.String cannot be cast to clojure.lang.IPersistentCollection\n12: \n13: (defn first-language\n14:   \"Returns the first language on the list.\"\n15:   [lang-list]\n16:   (lang-list first))\n\n----- Locals -------------------------------------------------------------------\nlang:      \"Clojure\"\nlang-list: ()\n\n----- Stack trace --------------------------------------------------------------\nclojure.core/conj                          - <built-in>\ntracks-on-tracks-on-tracks/add-language    - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:11:3\ntracks-on-tracks-on-tracks/add-language    - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:8:1\ntracks-on-tracks-on-tracks/add-language    - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:33:106\ntracks-on-tracks-on-tracks/add-language    - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:8:1\n...\ntracks-on-tracks-on-tracks/count-languages - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:23:1\ntracks-on-tracks-on-tracks/learning-list   - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:33:3\ntracks-on-tracks-on-tracks/learning-list   - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:28:1\ntracks-on-tracks-on-tracks                 - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/src/tracks_on_tracks_on_tracks.clj:36:1\ntracks-on-tracks-on-tracks-test            - /home/porky/exercism/clojure-test-runner/exercises/concept/tracks-on-tracks-on-tracks/test/tracks_on_tracks_on_tracks_test.clj:2:3"
}

oke, then I have to find out what is wrong here

not on my browser

I see this :

Well since you (and Erik) have been both experiencing this something funny is likely going on

I think so, I see now on 2 challenges that all test were green and no error message and no chang to submit

but can you help me what is wrong with my code

and sorry no idea why that on Erik and I we do not see the error message

It says on line 11 you're trying to cast a string to a coll. Could the args to conj be reversed?

yep , that was it

thanks

np, but why it didn't report the error is still a mystery. I'll be looking into it.

oke

there is a issue of that

I suspect that the problem is a syntax error which is not displayed

I had it now on 2 challenges

But this one is solved and I ask mentor feedback on it

good luck with finding out what is wrong with the error reporting

but if I can help with testing things , just ask

That's much appreciated 🙂 Part of the process seems to be that we're only handling an expected subset of a nearly infinite set of possible solutions. Eventually we'll start to converge on maximum coverage.

nice to see. Cannot wait to test it all out @porkostomus