Tom Short

I like the idea of metadata, but I'm worried that it complicates things, especially if applied to a DataFrame. As John said, a demo would be a great way to...

Regarding "Nullable", can't you just use `colwise` and extract that from the column type? Arrays can't have missing data and DataArrays can. Actually Arrays could have missing data if the...

Sounds good, John.

Great ideas, Matt!

I'm having trouble figuring out why the code above that uses `Val{}` is not type stable. The problem is with `axisindexes` used inside `getindex`: ``` julia julia> @code_warntype B[1, Val{:b}]...

I'm not sure if it was intentional. There's a difference in how the indexes into the subarray become stored. With `Axis`, it's `Colon`, and with direct indexing, it's a `UnitRange`....

Thanks for looking! It's probably best not to do anything. I'd rather not see key bindings that might be wrong.

Is the issue with `this()` and swapping values related to SSA removals (`rmssa()`)? It looks like some assignments are getting thrown out. Pinging @MikeInnes. Treating unsigned vs. signed is also...

I agree on the approach of implementing our own array type in Julia. Eventually, I think we'll want to support code that uses Julia arrays, so we'll either have to...

Phi nodes was a complication I was worried about, but maybe those can be thrown out, too.