Greetings,

From #atoms/4 to #atoms/7 , the page runs (reset! atomic-clock 0) without informing the user.
The page should inform the user that this function was called, or the user could assume that the atom still has the previous value.
I had to consult the answers to be able to solve it.

Maybe someone has commented on this before, but this is impossible to solve AFAIK :D

http://clojurescriptkoans.com/#higher-order-functions/7

Should probably be using mapv instead?

(= [10 20 30] (mapv (fn [x] ) (filter (fn [x] ) [1 2 3 4 5 6 7 8])))

http://clojurescriptkoans.com/#destructuring/6

Or more succinctly
(= "123 Test Lane, Testerville, TX" (let [{:keys [street-address ]} test-address] ))

console output:

Evaluating  util.cljs:10
nil 

This one http://clojurescriptkoans.com/#conditionals/1

It also kills safari and opera.

This is returning true in the repl but fails in the koan:

(= "Rich Hickey aka The Clojurer aka Go Time aka Macro Killah" (let [[first-name last-name & aliases] (list "Rich" "Hickey" "The Clojurer" "Go Time" "Macro Killah")] 
(clojure.string/join " " (reduce conj [first-name last-name "aka"] (interpose "aka" aliases)))
))

I accidentally hit Enter twice when submitting a correct answer, and the next two koans appeared on top of each other (see attached screenshot), and the submission stopped working for both koans.

Refreshing the page did fix the interface

.

For some weird reason, even when entering the correct solution (tested successfully in Chromium and double checked with other users), i'm being told i haven't attained enlightenment yet when using Firefox 25 (Archlinux).

If I open the javascript console, here's what I have:

[13:25:55.199] "Evaluating  (= [[:top :left] [:top :middle] [:top :right] [:middle :left] [:middle :middle] [:middle :right] [:bottom :left] [:bottom :middle] [:bottom :right]] (for [row [:top :middle :bottom] column [:left :middle :right]]  [row column] ))"
[13:26:14.285] "#<InternalError: too much recursion> at line 1"

Actually I am using KXStudio with KDE on top which is based on Ubuntu 64bit.
Firefox version is 41.0.2
When I go to the first koan (http://clojurescriptkoans.com/#equality/1) all I can see is the koans logo image (painted circle).
"View source" shows exactly the came code as in Chrome.
The inspector in Chrome shows body with id="dummybodyid" and nested I can see the koan

 <div class="koan koan-0" style="display: block;">...</div>

all works fine.
In Firefox however, the id="dummybodyid" is missing from the body, and so is the koan.
The next div in chrome:

 <div class="category" style="display: block;">equality</div>

The same div in Firefox:

    <div class="category"></div>

...empty, nothing.
All looks as if clojurescript isn't running at all, yet all clojurescript files downloaded just fine.
FireBug shows this:

-> uncaught exception: Invalid match arg: /\(quote (.*?)\)/ <unknown>
-> This site makes use of a SHA-1 Certificate; it's recommended you use certificates with signature algorithms that use hash functions stronger than SHA-1.[Learn More] connect.facebook.net
-> Use of getPreventDefault() is deprecated.  Use defaultPrevented instead. jquery.min.js:2:0

Any clue what's going on? Instinct tells me it's the uncaught exception's fault
cheers
Jared

The koans now seem completely nonfunctioning to me in Safari, both on OS X (10.11) and iOS (9.1).

Here's the stack trace for the error I get on any page:

This is likely related to #11. Although I could investigate this on its own, it might be worth waiting until #10 happens, both because the problem might fix itself and because dealing with outdated tooling might turn out to be a major pain.

This exception is thrown whenever I try to begin the koans on the url

http://clojurescriptkoans.com/#equality/1

and also on other urls:

http://clojurescriptkoans.com/#equality/3

I had no problems last week where I looked at the koans.

Same error in chromium and firefox.

Here is a stacktrace from chromium:

replace (string.cljs:33)
expr_to_string (meditations.cljs:61)
expr_to_array (meditations.cljs:76)
koan_for_index (meditations.cljs:91)
render_current_koan (core.cljs:135)
(anonymous function) (core.cljs:173)
l (jquery.min.js:2)
c.fireWith (jquery.min.js:2)
v.extend.ready (jquery.min.js:2)
A (jquery.min.js:2)

Hello! I'm building a website for ClojureScript learning resources in russian https://clojurescript.ru/. I really like ClojureScript Koans. Do you mind if I build a clone of it in russian?

(def test-address
{:street-address "123 Test Lane"
:city "Testerville"
:state "TX"})

(= "Test Testerson, 123 Test Lane, Testerville, TX" (
#(apply str (apply str (interpose " " %1)) ", " (apply str (interpose ", " (map val %2))))
["Test" "Testerson"] test-address))

it is here:
http://clojurescriptkoans.com/#creating-functions/3
doesn't let you through when the gap filled with

multiply-by-5 4

i.e.

(= 20 (let [multiply-by-5 (partial * 5)] (multiply-by-5 4)))

evaluates to true, but the koan doesn't let you through.

edit:
The next one
http://clojurescriptkoans.com/#creating-functions/4
also doesn't work. This one should actually work without input in the second field.
edit 2:
It didn't work when I simply refreshed the page, but when I did it with [shift + F5] suddenly it all worked. Weird stuff...

Submit any answer to those koans with (hello) in them, and JS spins up to 100% CPU and eventually crashes my WebKit process.

I'm running Safari 10.1 (12603.1.30.0.34).

eg any question of the format

(= ?? (any complex thing here))

will pass if you submit ",", because it then becomes

(= , (thing))

which is

(= (thing))

which is truthy.

might be fixable somewhere like here? https://github.com/lazerwalker/clojurescript-koans/blob/master/src/koans/core.cljs#L57-L59

In your exercise for higher-order functions you seem to be implying that using map over a vector yields a vector.

(= [] (map (fn [x] (* 4 x)) [1 2 3]))
;; And this exercise too.
(= [1 4 9 16 25] (map (fn [x] ) [1 2 3 4 5]))

This could be, imho, a bit misleading for people coming to Clojure for the first time. I suggest using

(seq '(4 8 12)) 

I can pass some exercises put only a ' symbol or '().

When they have the following form: (= ___ ( bla bla bla))

When I build this, cljs wasn't self-hosted. As a result, it currently exists as a very fragile hack whereby there are two parallel cljs stacks existing in the browser at the same time: a modern (at the time) one, and a hacky, old, mostly-functioning self-hosted fork that existed purely to do in-browser execution of user code.

Now that CLJS is itself properly self-hosting, this can be simplified greatly.

Not sure if this is a real issue just realized this upon using clojurescriptkoans as a way to prep for my upcoming employment.

By definition in the REPL: a set #{ 1 1 2 3} logs an error about duplicate 1 keys, makes sense right?

But the above koan seems to accept a set with duplicates as if it was correct. I wouldn't mind working in the fix myself, would love to be a contributor to such a cool technological way to educate people!

Im up to http://clojurescriptkoans.com/#destructuring/3 and i feel like its getting harder and harder to read the code

I was able to pass through with just about any input. For example: the keyword :inconcievable is acceptable, but: a b - which I presume is the answer - is not).

See e.g. this error – not related to the commit itself but to an issue with how Travis CI is set up for the repo. I think they probably renamed lein2 to just lein.

Newbie here and I was stumped at this.

Should we perhaps follow clojure koans to use str (shown below) instead of identity / (fn [x] x) ? Either that or introduce the identity function earlier?

adomixaszvers/clojure-koans@847b095

(= 2400 (reduce (fn [a b](* a b)) :_ [1 2 3 4]))

I am not sure how to solve this.

My workaround is:

(= 2400 (reduce (fn [a b](* a b)) (into [100] [1 2 3 4])))
true

... but with additional parentheses at the end.

Could you help me here?

There are some koans in clojure-koans[1] that are missing from clojurescript-koans. Can we add these koans to this project?

[1] https://github.com/functional-koans/clojure-koans/tree/master/src/koans

When user hits return after entering correct answer, he's transferred to next page immediately.
Better leave him on the same page with some indication of correctness, to contemplate the correct answer.
This may seem unimportant, but it's not: such a change will improve learning significantly.
For more info, google principles of programmed instruction (PI).
I hope it's trivial to implement.

Although issues #7 and #18 were fixed by commit 2d469c6, a similar issue remains with regard to the "discard form" reader macro. You can still "cheat" on koans of the form (= :__ the-answer) by submitting an answer like #_(), which will be read as the equivalent of an empty string.

There's a few different ways that we could handle this. Should we just discard inputs that contain the character sequence #_ as invalid? Should we disable the #_ reader macro entirely? Or should we do something more sophisticated, like completely replacing the current input validation method with a requirement that every input string has to contain at least one valid Clojure form? (This is the one I'm leaning towards.)