Set creation and operations in Swift - Mini Project: Build & Apply

Set creation and operations

📖 Scenario: You are organizing a small community event. You have lists of people who signed up for different activities. You want to use sets to manage these lists and find who is attending which activities.

🎯 Goal: Build a Swift program that creates sets of attendees for two activities, finds who is attending both activities, and who is attending only one.

📋 What You'll Learn

Create two sets with exact names and values

Create a variable for the union of the two sets

Create a variable for the intersection of the two sets

Print the union and intersection sets exactly

💡 Why This Matters

🌍 Real World

Managing event attendees and their participation in different activities helps organizers avoid duplicates and understand overlaps.

💼 Career

Set operations are useful in data processing, filtering unique items, and comparing groups in software development.

1

Create two sets of attendees

Create a set called activityA with these exact names: "Alice", "Bob", "Charlie". Then create another set called activityB with these exact names: "Bob", "Diana", "Eve".

Swift

# Your code here to create sets activityA and activityB

Need a hint?

Use let to create sets with square brackets and commas between names.

2

Create a union set of all attendees

Create a variable called allAttendees that is the union of activityA and activityB.

Swift

let activityA: Set = ["Alice", "Bob", "Charlie"]
let activityB: Set = ["Bob", "Diana", "Eve"]
# Your code here to create allAttendees as the union of activityA and activityB

Need a hint?

Use the union method on activityA with activityB as argument.

3

Create an intersection set of attendees in both activities

Create a variable called bothActivities that is the intersection of activityA and activityB.

Swift

let activityA: Set = ["Alice", "Bob", "Charlie"]
let activityB: Set = ["Bob", "Diana", "Eve"]
let allAttendees = activityA.union(activityB)
# Your code here to create bothActivities as the intersection of activityA and activityB

Need a hint?

Use the intersection method on activityA with activityB as argument.

4

Print the union and intersection sets

Print the variables allAttendees and bothActivities exactly using two separate print statements.

Swift

let activityA: Set = ["Alice", "Bob", "Charlie"]
let activityB: Set = ["Bob", "Diana", "Eve"]
let allAttendees = activityA.union(activityB)
let bothActivities = activityA.intersection(activityB)
# Your code here to print allAttendees and bothActivities

Need a hint?

Use print(allAttendees) and print(bothActivities) to show the sets.