that's a good code

No, it should not. Closing.

I didn't realize one could chain to the end of enum block like that. This helped me to refactor my solution, thanks!

厉害,一行搞定

I love it. Short. Elegant. Literally does what this function is supposed to do. Change every character except the last 4. Beauty!

doing generally same thing but on last fixed test recieve 3 instead of 7 :(

This one's hot, love it!

Thank you very much for explanation.

This solution is far more elegant than the top one. In fact, no solution could be simpler than this one.

Turns out you're right! Thank you. Didn't think about it when I submitted.

I think title.downcase is uneccessary as capitalize already does this.

Should specify that NaN is a valid input.

After reading this, I feel so stupid, haha. Well done!