Looking for technical reviewer for my upcoming Julia book

[Tamas_Papp]

I am not the best person to ask about his, but this post could be a good starting point:

Announcement: An Update on DataFrames Future Plans

This post summarizes the current roadmap for DataFrames.jl and the data ecosystem in general for the Julia 1.0 milestone. Plans have changed significantly since the previous post. Indeed, it has appeared that representing missing values via the special Nullable type is not the only solution to attain a high performance in Julia. Thanks to work done by @jameson and @quinnj, it turns out that representations of nullable values similar to that used by DataArrays (i.e. Union{T, NAtype}) can also be …

Some of the issues/PRs mentioned there have been resolved already, look on Github for new ones

Also

Port dependencies to Missing and CategoricalArray