How to get the union of a set and an array in Swift
Overview
A union is a set that contains values or elements present in the sets we are comparing. We can use the union() method to get the union between a set and an array.
Differences between a set and an array
A set contains unique elements, whereas an array may or may not contain unique elements.
Syntax
set.union(sequence)
Get the union between a set and an array in Swift
Parameter
We specify a sequence that could either be an array or a set. The union between the set and this sequence is taken.
Return value
It returns a new Set, which contains the elements of the union of Set and sequence.
Example
// create some setslet evenNumbers : Set = [2, 4, 6, 8, 10]let oddNumbers : Set = [3, 5, 7, 9, 11]let alphabets : Set = ["a", "x", "s", "w", "j"]// create some arrayslet numbers = [1, 100, 30, 3]let letters = ["a", "b", "c", "d"]// get and print the uionsprint(evenNumbers.union(numbers).sorted())print(oddNumbers.union(numbers).sorted())print(alphabets.union(letters).sorted())
Explanation
- Lines 3–5: We declare three
Setinstances and initialize them.
- Line 8–9: We declare two arrays,
numbersandletters.
- Lines 12–14: We use the
union()method to get the unions between the sets and arrays and sort the resulting union. Next, we print the results to the console.
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