You won't be able to answer this simple JavaScript question!

Last night, I was scrolling through twitter and I found a interesting JavaScript question, and I bet you won't be able to answer this without cheating.

Let's see how long would would it take for you to answer this one:

What does ("b" + "a" + + "a" + "a").toLowerCase() output in JavaScript?

The question does look simple, but the answer will definitely blow your mind.

Tell me how long it took you to answer in the comments.

And Yes, JavaScript is crazy!

Comments

[codeyStein]

It's the little things that makes javascirpt so annoying :)

[Camilo Martinez]

Now try console.log(new Array(4).join(Number('y tho') + 'a')+' Batman!') 🦇

[Sadeedpv🥇]

NaNaNaNaNaNa batman! is that the desired output or am I missing something? 🤔

[Camilo Martinez]

Yes, maybe for people from my generation 😅.

Now I think this joke is too old 👴

[Alex Lohr]

NaN is actually part of IEEE 754, which is used in most languages to express floating point numbers.

[Chrissy Vinco]

Okay the person who thought of this problem is soooo clever

[intermundos]

In your case it's bananaa

[Sadeedpv🥇]

It's banana

[Meir Gabay]

I wanted to see if ChatGPT will get it right.. And it did :)

The NaN part is very interesting, as one of the "a" chars is dropped, initially, I didn't understand why it's not "bananaa" (extra "a"), now I get it 💪🏻

[Khair Alanam]

That's honestly cool.

[Sadeedpv🥇]

and weird

[BOSSHIE]

console.log(("b" + "a" + + "a" + "a").toLowerCase());

banana

[Sadeedpv🥇]

✅✅

[overFlow]

now i see why typeScript and them exist.
obviously it is string :"b"+string :"a"+NaN+string :"a".
Do not ask me about the last string :"a".
let us say it is your homework.

[Joe Burkhart]

It took me a second because I didn't notice the ++ (Unary plus) right away. Definitely got a little laugh out of me once I caught it though.