[nmca]

Why is the method called sendOnce? It’s send with a capacity limiter / semaphore right, so what about it is Once?

[saagarjha]

I think it really ought to be called "sendOneAtATime" but I assume the author just picked a bad name for it.

[mgradowski]

I'm really confused because I had to scroll half the comment section for the word `semaphore`.

This seems to be an interview question about JS esoterica, not concurrent programming.