Creating an empty dataframe from a vector of strings fails?

New to Julia
6

First, you can take advantage of the fact that DataFrame constructor by default copies columns so you can write:

DataFrame(col_names .=> Ref([]))

Now if you want different element types for columns you can write e.g.:

DataFrame(col_names .=> [T[] for T in [Int, String, Bool, Char]])

or (via a small hack):

DataFrame(col_names .=> rand.([Int, String, Bool, Char], 0))
3 Likes