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union

union(s1,s2...) ∪(s1,s2...)

Construct the union of two or more sets. Maintains order with arrays.

Examples

julia> set1 = Set(3, 4, 5, 6) 
       set2 = Set(1, 3, 4)
       union(set1,set2)
Set{Int64}({4,3,5,6,1})

julia> a = Set("Hello")
Set{Char}({'e','H','l','o'})

julia> b = Set([10:-1:6])
Set{Int64}({7,9,10,8,6})

julia> union(a,b)
Set{Integer}({7,9,10,'e','H','l',8,'o',6})

julia> union([1, 2, 3], [3, 4, 5])
5-element Array{Int64,1}:
 1
 2
 3
 4
 5

julia> union([1, 2, 3], [3, 4, 5], [6, 7, 8])
8-element Array{Int64,1}:
 1
 2
 3
 4
 5
 6
 7
 8

julia> union([1, 2, 3], [3, 4, 5], [5, 6, 7])
7-element Array{Int64,1}:
 1
 2
 3
 4
 5
 6
 7

julia> union([1, 2, 3], [4, 5, 6])
6-element Array{Int64,1}:
 1
 2
 3
 4
 5
 6

julia> union(["apple", "banana"], ["banana", "orange"])
3-element Array{String,1}:
 "apple"
 "banana"
 "orange"

julia> union(Set([1, 2, 3]), Set([3, 4, 5]))
Set{Int64} with 5 elements:
  4
  2
  3
  5
  1

Common mistake example:

julia> union([1, 2, 3], 4, 5)
ERROR: MethodError: no method matching union(::Array{Int64,1}, ::Int64, ::Int64)

In this example, the union function is expecting sets or arrays as arguments and not individual elements. Make sure to pass sets or arrays as arguments to the union function.

See Also

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