It was something like "Delete the nth occurence of an element"
I don't exactly remember.

Maybe the title of the kata should be changed to "Delete occurrences of an element if it occurs more than n times" or something like that
I got completely confused by it :D

It should work, but it doesn't for some reason.

No, I meant the test cases that appear in the "Your test cases" box on the bottom and run when you hit "Run Tests".
Here's some if you wanna put them.

Test.assertEquals([].toString(), "[]", "Should be able to handle empty arrays");
Test.assertEquals([[[[[[]]],[]]]].toString(), "[[[[[[]]],[]]]]", "Should be able to handle empty nested arrays");
Test.assertEquals([1.545,[2,4,[23532],55,2.3,[15.22,0.3,[],[[72,3],5]]]].toString(), "[1.545,[2,4,[23532],55,2.3,[15.22,0.3,[],[[72,3],5]]]]", "Should work with nested arrays");
Test.assertEquals(["foobar",[["hello"]]].toString(), "['foobar',[['hello']]]", "Should enclose strings with single quotes");

Great and fun kata, keep it up.
just needs some test cases. :D

Same issue happening to me (javascript version)
4 tests are failing out of 68 every time I submit
even though my solution doesn't round or truncate any numbers
e.g:
abs(actual - expected) must be <= 1e-2. Expected was -1.00e+0, but got 1.11e+2
abs(actual - expected) must be <= 1e-2. Expected was -1.00e+0, but got 5.74e+1
abs(actual - expected) must be <= 1e-2. Expected was -1.00e+0, but got 5.12e+1

Maybe you should mention that in the kata's description
it got me confused :D
Great kata.

Great and fun kata
well done.

Yes indeed it does
forgot to mention it :D

Maybe you should add test cases for Math.pow using negative exponents
because the original javascript's Math.pow accepts them
e.g:

Math.pow(10, -3) === 0.001
Math.pow(5, -2) === 0.04

some solutions don't work with negative exponents (just returns 1)
Just a suggestions though.

Awesome and fun kata
well done :D

Sorry for the late response
I thought the point of the kata was make the property names work as they are not change them.
I misunderstood :D

Great kata for beginners in general
but you should write tests to check for the original property names
1stname, second-name, etc...
some solutions simply passed by changing property names