José Valim

I think we still need describe in here. Does dplyr have something similar?

We should probably normalize the Rust APIs well.

All of the dump functions should return the contents that we would have found in the file if we used to_format + File.read. So the idea is to skip the...

A PR is definitely welcome!

What do you think should happen? I would prefer to raise, but with a better error message.

If we can show the length for both left and right sides, then that’s even better. And yes, the new handling of empty lists is on purpose!

> I think that returning an empty Series for this is suboptimal, shouldn't we expect that when comparing two empties we should have a truthy value? After all, they are...

> but also the ability to always use contextual instructions instead of realising a series immediately. To clarify, this will always be true for both APIs! We can change `DF.filter(...,...

> Honestly, I'm wondering if we need to settle on this right away. I think there would be plenty of immediate benefit in locking down the non-macro API: I agree...

> I think we should only have filter_with, arrange_with, etc Actually, keep the existing APIs around, introduce the new ones, and then replace the old ones by macros when ready.