DecimalToBinary.jl

julia> function decToBin(n)
           if n > 0
               x = decToBin(n ÷ 2)
               return x === nothing ? [n % 2] : append!(x, n % 2)
           end
       end
decToBin (generic function with 1 method)

julia> decToBin(4)
3-element Vector{Int64}:
 1
 0
 0

# adding padding

julia> function decToBin(n, p)
           if n > 0
               x = decToBin(n ÷ 2, p-1)
               return x === nothing ? append!(zeros(p-1), n % 2) : append!(x, n % 2)
           end
       end
decToBin (generic function with 2 methods)

julia> decToBin(3, 3)
3-element Vector{Float64}:
 0.0
 1.0
 1.0