Julia - DataFrames Insert a Row at Specific index in Julia 1.1 - dataframe

Question

How can I insert a row in a dataframe in Julia at a specific index ? (Julia version 1.1)
I have found this related question. However, the code given in the answer isn't working anymore in Julia 1.1
I know how to push! a row into a dataframe or concatenate two dataframes, but what about inserting at a specific index ?
It also doesn't seem to be explained in Julia DataFrames documentation.

Answer 1

This is a non-standard operation. The recommendation given there is still valid, so:
df = DataFrame(x = [1,2,3], y = ["a", "b", "c"])
foreach((v,n) -> insert!(df[n], 2, v), [4, "d"], names(df))
works. A shorter version to write it under Julia 1.0 would be:
insert!.(eachcol(df, false), 2, [4, "d"])
(the need to add false as a second argument will not be needed in the future as we are in the deprecation period now)
The difference is that getproperty method can be overloaded since Julia 1.0 so df.columns does not work.
I have also updated the other answer, so you can close this question if you prefer.
EDIT
The instructions above are no longer valid (unless you use very old DataFrames.jl version).
In DataFrames.jl 1.4 use insert!, push!, or pushfirst! functions depending on where you want to add the row:
julia> using DataFrames
julia> df = DataFrame(x = [1,2,3], y = ["a", "b", "c"])
3×2 DataFrame
Row │ x y
│ Int64 String
─────┼───────────────
1 │ 1 a
2 │ 2 b
3 │ 3 c
julia> insert!(df, 2, (100, "new line"))
4×2 DataFrame
Row │ x y
│ Int64 String
─────┼─────────────────
1 │ 1 a
2 │ 100 new line
3 │ 2 b
4 │ 3 c
julia> push!(df, (200, "last line"))
5×2 DataFrame
Row │ x y
│ Int64 String
─────┼──────────────────
1 │ 1 a
2 │ 100 new line
3 │ 2 b
4 │ 3 c
5 │ 200 last line
julia> pushfirst!(df, (300, "first line"))
6×2 DataFrame
Row │ x y
│ Int64 String
─────┼───────────────────
1 │ 300 first line
2 │ 1 a
3 │ 100 new line
4 │ 2 b
5 │ 3 c
6 │ 200 last line