replace col names by index or current value about dataframes.jl HOT 3 CLOSED

oops, didn't see that this was done already! replace_names(df, ...)

from dataframes.jl.

I would comment that for rename!(df, function) at least, if the function argument goes first, then you can write this:

rename!(df) do name
 # compute new name from old name
end

I realize that in this case that's a somewhat awkward order for the arguments. Just thought I'd point it out.

from dataframes.jl.

rename! might be a better name.

from dataframes.jl.