how to get the union of two sets in swift

To get the union of two sets in Swift, you can use the union method provided by the Set class. Here's an example:

main.swift
let set1: Set<Character> = ["a", "b", "c"]
let set2: Set<Character> = ["b", "c", "d", "e"]

let setUnion = set1.union(set2) // Returns a new set with elements from set1 and set2.

print(setUnion) // Prints ["e", "b", "a", "d", "c"]
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In the example above, we have two sets set1 and set2 with some overlapping elements. We use the union method to get a new set that contains all the unique elements from both sets.

If you have two arrays and want to get the union of their elements, you can create sets from the arrays and use the same union method. Here's an example:

main.swift
let array1 = ["a", "b", "c"]
let array2 = ["b", "c", "d", "e"]

let set1 = Set(array1)
let set2 = Set(array2)

let setUnion = set1.union(set2)

print(setUnion) // Prints ["e", "b", "a", "d", "c"]
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In the example above, we first convert the arrays array1 and array2 into sets set1 and set2 using the Set constructor. We can then use the union method to get a new set that contains all the unique elements from both arrays.