Uncover the Power of Set Properties in Swift

The Anatomy of isEmpty

The isEmpty property is a part of the Set class and takes no arguments. Its primary function is to check if a set is empty or not. The syntax is straightforward:

let setName: Set = ["John", "Mary", "Jane"]
let isEmptyResult = setName.isEmpty

where setName is an object of the Set class.

Deciphering the Return Values

So, what does isEmpty return?

• true if the set is empty, meaning it doesn’t contain any elements.
• false if the set contains some elements.

Putting isEmpty to the Test

Let’s explore two examples to see isEmpty in action:

Example 1: A Tale of Two Sets

In this example, we have two sets: names and employees. names contains three string elements, while employees is an empty set.

let names: Set = ["John", "Mary", "Jane"]
let employees: Set = []

print(names.isEmpty) // Output: false
print(employees.isEmpty) // Output: true

The output:

• names.isEmpty returns false, indicating that the set is not empty.
• employees.isEmpty returns true, confirming that the set is indeed empty.

Example 2: Using isEmpty with Conditional Logic

In this scenario, we’re working with a names set that’s not empty. We’ll use isEmpty with an if...else statement to execute different blocks of code based on the set’s state.

let names: Set = ["John", "Mary", "Jane"]

if names.isEmpty {
    print("The set is empty")
} else {
    print("The set is not empty")
}

The output:

Since names is not empty, the if block is skipped, and the else block is executed.

By leveraging the isEmpty property, you can write more efficient and effective code, making it easier to manage your sets in Swift.