Different modification behavior when looping over array of variables of different array types

[StevenSiew]

@chaseleslie

function filterarrays!(d)
    for arr in [d["a"], d["b"]]
        deleteat!(arr, 2)
    end
end

d = Dict("a" => [1, 2, 3], "b" => [1., 2., 3.])
display(d)
filterarrays!(d)
display(d)

julia> d = Dict("a" => [1, 2, 3], "b" => [1., 2., 3.])
Dict{String, Vector} with 2 entries:
  "b" => [1.0, 2.0, 3.0]
  "a" => [1, 2, 3]

julia> function filterarrays!(d)
           for arr in Any[d["b"], d["a"]]
               deleteat!(arr, 2) |> display
           end
       end
filterarrays! (generic function with 1 method)

julia> display(d)
Dict{String, Vector} with 2 entries:
  "b" => [1.0, 2.0, 3.0]
  "a" => [1, 2, 3]

julia> filterarrays!(d)
2-element Vector{Float64}:
 1.0
 3.0
2-element Vector{Int64}:
 1
 3

julia> display(d)
Dict{String, Vector} with 2 entries:
  "b" => [1.0, 3.0]
  "a" => [1, 3]

you just use “Any” before [ d[“a”] , d[“b”] ]