How to check if two sets are equal in Swift

Overview

We can check if two sets are equal in Swift by using the equality operator ==. Two sets are equal if both contain the same elements. If they are equal, the operator returns true. Otherwise, it returns false.

Syntax

set1 == set2
Syntax to check if two sets are equal in Swift

Parameters

set1: This is a set on the left-hand side of the operator. It is one of the two sets we want to compare.

set2: This is the set on the right-hand side of the operator. It is the other of the two sets that we want to compare.

Return value

The value returned is a boolean value. If the sets are equal, then a true is returned. Otherwise, a false is returned.

Code example

// create some sets
let evenNumbers : Set = [10, 2, 6, 8, 4]
let oddNumbers : Set = [11, 5, 7, 3, 9]
let evenNumbers2 : Set = [2, 4, 6, 8, 10]
let first_names : Set = ["john", "jane", "henry", "mark"]
let last_names : Set = ["jane", "john", "henry", "mark"]
// check if equal 
print(evenNumbers == oddNumbers)   // false
print(evenNumbers == evenNumbers2) // true
print(first_names == last_names)   // true

Explanation

  • Lines 2-6: We create some set instances and initialize them with some values.
  • Lines 9-11: We compare the sets to find if they are equal by using the double equality operator. Then we print the results to the console.

Free Resources

License: Creative Commons-Attribution-ShareAlike 4.0 (CC-BY-SA 4.0)