Hi, I have many problems to build arrays with the keys of a dictionary except for the simple situation :
a = [uppercase(key) for key in keys(dict)] # works fine If I try to select the keys with more complex criteria like : dict = Dict("a" => 1, "b" => 2, "c" => 3, "d" => 4, "e" => 5) a = Array{String} for k in keys(dict) if dict[k] < 2 continue end push!(a, k) # building array from keys produces errors end ERROR: MethodError: `push!` has no method matching push!(::Type{Array{ AbstractString,N}}, ::ASCIIString) Thank you for your help !