Rejected for using outdated language version.

Forking is still possible, so no work is necessarily lost.

Will not handle unicode characters such as ö/Ö, Ş/ş etc.

Maybe he just mean, function wont return nil in case of empty string?

wave = []string{} ??? best practice?
allocations will still happen!

if you want to avoid this, set the capacity
wave = make([]string, 0 , len(words))

Not sure how this never got looked at.

The language version is now invalid, if you update it, ill approve.

I kneel.

Runes in Go loosely equate to the "charcode as an int", and are represented by single-quotes.

It's definitely a bit 'black magic', but it says:
Take the charcode stored in c, take off the charcode of "a" (97) and add the charcode of "A" (65). Then, convert the result back to a string.

So, for example, the letter "r" has ascii value 114. 114 - 97 + 65 = 82, which is the charcode of R.

can someone explain what exactly this does and how?
string(c-'a'+'A')

Good to know, thanks!
I had just copied the python one, which I've also fixed now.

Language-specific code blocks use lowercase language names.

fixed

The Haskell sample tests have the solution-method in them. Probably shouldn't!

Haskell translation