bro don't beat yourself up. I did pretty bad myself, but with practice you'll get better!
And this doesn't mean you're 'dumb', there is no absolute for being dumb or smart, those are just socially forced standards.

I write on Scala and have same problem.

Should be fixed. Remember to click RESET in the trainer to see new tests.

same here, the sample test doesn't work but can still successfully complete the kata using random tests

Having to deal with the case where nothing is passed in as a parameter was just annoying.

Node v18 is enabled now. Closing.

No:

Assume the key is repeated for the length of the text, character by character. Note that some implementations repeat the key over characters only if they are part of the alphabet -- this is not the case here.

It's been already discussed 4 years ago: https://www.codewars.com/kata/52d1bd3694d26f8d6e0000d3/discuss#6050b777d2342a000e60697f

The test for c.encode("it's a shift cipher!") is broken. Actual value for assertion should be "xt'k s ovzii cahdsi!" in Java.

Approved it myself.

this good one for sure learn somthing new.

Oh, thanks man. with passing the time I hope get the right using of this platform.

kata hint != kata suggestion

hi folks, thanks for this kata And I hope to add this trick which includes: not all the letters in the passed string are little.

I invalidated this one, but not some other solutions that I could easily invalidate (this is because I like seeing creative solutions).

You inspired me to create a new spin-off.