Yes, Julia does support arbitrary indexing because base functions are written in terms of `firstindex`, `eachindex` and `lastindex` etc. One can see it in the

Yes, Julia does support arbitrary indexing because base functions are written in terms of `firstindex`, `eachindex` and `lastindex` etc. One can see it in the implementation of `filter!` for example https://github.com/JuliaLang/julia/blob/ab4e036b9209967b427345f99fb27a551c9aff60/base/array.jl#L2554 https://github.com/JuliaLang/julia/blob/ab4e036b9209967b4273... :