How to Initialize a Set in Swift - Step by Step Examples

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How to Initialize a Set in Swift ?

Answer

To initialize a set in Swift, you can use the Set data structure with various initialization methods.

✐ Examples

1 Initialize Set with Array Literal

In this example,

We declare a set variable named mySet.
We initialize mySet with an array literal containing initial elements using the Set type initializer Set(arrayLiteral:).
This method creates a set containing the elements from the array literal, ensuring uniqueness of elements.
We can now manipulate mySet using set operations such as adding elements, removing elements, and checking for membership.

Swift Program

var mySet: Set<String> = Set(arrayLiteral: "apple", "banana", "orange")

// mySet is now initialized with elements "apple", "banana", and "orange"

// Example usage:
// Add elements to the set
mySet.insert("kiwi")

// Remove elements from the set
mySet.remove("banana")

// Check if an element is present in the set
let containsElement = mySet.contains("apple")

print("Is element 'apple' present in the set: \(containsElement)")

Output

Is element 'apple' present in the set: true

2 Initialize Empty Set

In this example,

We declare an empty set variable named emptySet.
We initialize emptySet using the default constructor Set().
This creates an empty set ready to be used for storing unique elements.
We can now manipulate emptySet using set operations such as adding elements, removing elements, and checking for membership.

Swift Program

var emptySet: Set<String> = Set()

// emptySet is now initialized as an empty set

// Example usage:
// Add elements to the set
emptySet.insert("apple")

// Remove elements from the set (if it exists)
emptySet.remove("apple")

// Check if an element is present in the set
let containsElement = emptySet.contains("apple")

print("Is element 'apple' present in the set: \(containsElement)")

Output

Is element 'apple' present in the set: false

Summary

In this tutorial, we learned How to Initialize a Set in Swift language with well detailed examples.

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How to Initialize a Set in Swift - Step by Step Examples

How to Initialize a Set in Swift ?

Answer

✐ Examples

1 Initialize Set with Array Literal

Swift Program

Output

2 Initialize Empty Set

Swift Program

Output

Summary

More Swift Sets Tutorials