yes, Strings are always immutable (unchangable)

If you ain't using 3 loops, you ain't trying!

Very cool solution, I need to get better at ternary statements and this helps thank you.

But now you do...

Wish I knew the replace method......

check this if may help https://www.javatpoint.com/java-string-replaceall

Can anyone explaine that (".", "#")? thank you very much

wow. Nice

Sometimes the answer is right in front of you... Looking at this makes me feel a bit silly about my solution :D

i though with the same logic but I consumed 15 lines of code, so thanks for this xD

I googled, and may be understood the patterns problem you mentioned. But this version is same as:
replace(char oldChar, char newChar) right?

Wow, I did not even think of using ?: in this kata. Nice!

well people do way better than me but appreciate it

Extra marks for squeezing all the air out of this code

I found the solution by observation. But I would like a proper math/logic explanation. Can someone help me please?