Left iPhone 4s on charger all night?

I had my iPhone 4s on its charger last night, and I fell asleep before unplugging it. It had been at a hundred for a while I assume, and I'm afraid it'll mess up my battery.
Will it?

No but restart your iphone a few times

No, I do it every night with my iPhone 5s, perfectly fine…

It won't. It's actually a good idea to keep your phone charged at night. That way you won't have to charge it multiple times a day. If you don't charge it fully (unplugging and plugging it in several times during the day), its going to wear out the battery.

I don't think so, but if you did it regularly it would.

No I used to have a 4s and now I have a 5c and I do (did) it every night

No it wouldn't