Anyone knows where's the error in this cmd?

[soyagiraru]

I’m using this command to select a winner between the sender and the user mentioned but it gives me an error

$(eval a=[$(sender),$(user)];a[Math.floor(Math.random()*a.length)])

and gives me:

[Error: Unexpected end of input]*a.length)])

I got the same response using it exactly how I found it in the forum from @Emily (worked for them):

$(eval a=[RESPONSE_1,RESPONSE_2,RESPONSE_3];a[Math.floor(Math.random()*a.length)])

Edit: I tested in the Nightbot and it works there, so might be something about Fossabot. Most things works for both but it seems this one not.

[xgerhard]

Hiya, this is a Nightbot support forum, we can’t help with Fossabot.

[soyagiraru]

Yep, I’ll have to find out another way, I posted it when I though it was an error of both bots