make renaming perform copy in transform and transform! #2721
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bkamins
commented
Apr 15, 2021
bkamins
commented
Apr 15, 2021
bkamins
commented
Apr 15, 2021
nalimilan
reviewed
Apr 15, 2021
nalimilan
approved these changes
Apr 16, 2021
Co-authored-by: Milan Bouchet-Valat <nalimilan@club.fr>
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in
transform!(df, :a => :b)we want to make sure that:bcolumn in the resulting data frame is not an alias of:acolumn as this can lead to hard-to-catch bugs.