feat: keep column order after filtering flag

[ianna]

No description provided.

[codecov]

Codecov Report

Merging #2234 (10413c5) into main (4e01cc4) will decrease coverage by 0.03%.
The diff coverage is 50.00%.

❗ Current head 10413c5 differs from pull request most recent head a7f1dd4. Consider uploading reports for the commit a7f1dd4 to get more accurate results

Additional details and impacted files

Impacted Files	Coverage Δ
src/awkward/_connect/rdataframe/from_rdataframe.py	0.00% <0.00%> (ø)
src/awkward/_connect/rdataframe/to_rdataframe.py	0.00% <ø> (ø)
src/awkward/operations/ak_from_rdataframe.py	17.64% <66.66%> (ø)
...rc/awkward/operations/ak_merge_union_of_records.py	88.70% <0.00%> (-9.33%)	⬇️
src/awkward/_nplikes/array_module.py	89.84% <0.00%> (-0.16%)	⬇️
src/awkward/_slicing.py	87.40% <0.00%> (-0.15%)	⬇️
src/awkward/operations/ak_full_like.py	98.18% <0.00%> (-0.10%)	⬇️
src/awkward/_do.py	84.39% <0.00%> (ø)
src/awkward/_util.py	74.42% <0.00%> (ø)
src/awkward/forms/listform.py	83.14% <0.00%> (ø)
... and 25 more

[ianna]

@jpivarski - please, have a look. I think, I'm done with this PR. Thanks!

[jpivarski]

Great! I see that out is the result of an ak.zip with depth_limit=1, so it's a RecordArray. Reordering this with IndexedArray is what we typically do.

I just noticed that from_rdataframe doesn't have highlevel and behavior arguments, though almost all of the ak.* operations do. As it is, this assumes highlevel=True, behavior=None. As possible, low-priority future work (independently of this PR), it would be nice to add these arguments.

[jpivarski]

Codecov didn't run, but I'm going to ignore that and merge it anyway.