It's a shame that I didn't understand the solution algorithm correctly and went in the wrong direction. Great kata!

It`s look great

thx

Sure, my mistake.

Shouldn't it be DuplicateCount then?

COBOL translation.

Go: function name should be in PascalCase (Duplicatecount).

Let's start with this: What part of the Kata description did you not understand?

it should be text.lower() not text.lower

We don't know what you are doing, but this is not a kata issue. Tests work fine in c++.

Check the docs about how to post your code here, so we can see what you did instead of guessing it.

I used lower()

did you reassign the variable text to something you shouldn't have? (e.g. text = str or something along those lines)

You're trying to iterate over an empty string.