Correct me if I am wrong but I think this solution doesn't pass the test if we pass an array [2, 5, 32] as the argument. The requirement says that the result needs to return 5 since 5 comes before 32, but this solution returns the number 32.

Wow, this is a clever way to use the send mehtod!!!

I still get the same result if I relace the "===" with the "==". Hence, what is the benefit of using "===" over the "=="? Could somebody enlighten me?

So, this is a recursive method right? And when do I know that I should use a recursive method though?

Yes, I also thought the same think. This solution absolutely is using string operation.

ah, I got it. Since everything in ruby is an object. So, if I do self ===, it will be equal to self.===, hence it will call the approriate method for the object self which is a string here. On the other hand, if I do /\A\d\z/.===, it will call "another kind" of === method since the object here is an regex.
Thanks very much, and have a nice day.

wow, I guess your backround is from Java, right? Nice one though. :)

Hi everybody, I don't why I can't pass the test if I do like this:
self === /\A\d\z/

I think they are the same solution, right?

Wow, you are really serious about helping other people. Your explaination should get more voted. Thank you very much, I have learned something new from it. Keep doing the good work, and have a nice day. :)

This is why I love ruby. :))

wow, this is so clever! :))