set - 向集合中添加新元素

Question

如何在 Julia 中将新元素 append 到 Set 中？对于数组，这可以通过追加完成

A = [1, 2, 3] # Array
S = Set(A)    # Set

append!(A, 4) # Works
append!(S, 4) # Does not work

Answer 1

对未排序的集合使用push!

julia> S = Set([1, 2, 3])
Set{Int64} with 3 elements:
  2
  3
  1

julia> push!(S, 4)
Set{Int64} with 4 elements:
  4
  2
  3
  1