if string? example [1,2,3."111"]...maybe not

great

There are so many ways to use without regex. I did use /n next line add it in my expression

same question, I squizzed out everything I have learned currently to solve it within 2 lines but these people are different level monsters.

Maybe you are pro, but I think mine is more human readable XD

I don't know why I didn't made this easy (I also checked array's size)

perfect

Amazing!!

Great workings!

there are many ways to slove this without regex

Where's conditions of these task.Or all conditions of these task is inside of reduce() method ?

nice one i also used the same method...

So simple, I managed to figure out that a regex would work but the experience really plays a role here, great job. Teahcing us all a lot.