Is it possible to access row index inside DataFramesMeta macros?

General Usage
1

Is there a way to access current_row_index in the following snippet ?

@with df begin
    fn.(:col, current_row_index)
end
2

No, unfortunately that is not possible. You would have to create a column storing the row number to do this.

@eachrow and @eachrow! allow the use of the row index, but they have different behavior than @with.

3

There’s a solution julia - Is it possible to access row index inside DataFramesMeta macros? - Stack Overflow

julia> using DataFramesMeta

julia> fn(x, y) = (x, y)
fn (generic function with 1 method)

julia> df = DataFrame(col=["a", "b", "c"])
3×1 DataFrame
 Row │ col
     │ String
─────┼────────
   1 │ a
   2 │ b
   3 │ c

julia> @with df begin
           fn.(:col, axes(df, 1))
       end
3-element Vector{Tuple{String, Int64}}:
 ("a", 1)
 ("b", 2)
 ("c", 3)