why

Current method mutate original array

ive used the same method... lol :)

now i know. ty (Y)

Linq has been a part of C# since version 3. It is not a separate library. Using linq means you are writing functional code. If you are a beginner, you should try writing loops to understand programming but I would never use a loop to find an item in a collection in production code.

everytime i see solutions with using System.Linq;

try without it. sure it is easy with libs.. but sometimes you dont have the possibility

It would be better to use StringBuilder rather than adding strings, since strings ar immutable i.e. for every loop step a new string must be stored.

where is the downvote button?

I basically tied to do the same and it didn't work

it's not recursive solution

Now that's clever.

Test no longer pass when Stringy is not even working properly.
Added random tests to prevent warriors to read them.
Renamed Stringy to stringy to match swift codestyles.

We tried. But obviously not hard enough.

Test cases are not setup

Test cases are not setup