Associate for map creation in Kotlin - Mini Project: Build & Apply

Associate for map creation

📖 Scenario: You work in a small bookstore. You have a list of book titles and their prices. You want to create a map where each book title is linked to its price for easy lookup.

🎯 Goal: Build a Kotlin program that creates a map from a list of book titles and a list of prices using the associate function.

📋 What You'll Learn

Create a list of book titles called books with these exact values: "Kotlin Basics", "Advanced Kotlin", "Kotlin Coroutines"

Create a list of prices called prices with these exact values: 29.99, 39.99, 34.99

Create a map called bookPrices by associating each book title with its corresponding price using associate

Print the bookPrices map

💡 Why This Matters

🌍 Real World

Creating maps from lists is useful when you want to link related data, like product names and prices, for quick access.

💼 Career

Many jobs require handling data collections and transforming them into maps or dictionaries for efficient lookup and processing.

1

Create the book titles list

Create a list called books with these exact values: "Kotlin Basics", "Advanced Kotlin", "Kotlin Coroutines"

Kotlin

// Create the list of book titles
// Your code here

Need a hint?

Use listOf to create a list with the given book titles.

2

Create the prices list

Create a list called prices with these exact values: 29.99, 39.99, 34.99

Kotlin

val books = listOf("Kotlin Basics", "Advanced Kotlin", "Kotlin Coroutines")
// Create the list of prices
// Your code here

Need a hint?

Use listOf to create a list with the given prices.

3

Create the map using associate

Create a map called bookPrices by associating each book title in books with its corresponding price in prices using associate and withIndex()

Kotlin

val books = listOf("Kotlin Basics", "Advanced Kotlin", "Kotlin Coroutines")
val prices = listOf(29.99, 39.99, 34.99)
// Create the map bookPrices associating books with prices
// Your code here

Need a hint?

Use withIndex() on books to get index and book, then associate each book with the price at the same index.

4

Print the map

Print the bookPrices map using println

Kotlin

val books = listOf("Kotlin Basics", "Advanced Kotlin", "Kotlin Coroutines")
val prices = listOf(29.99, 39.99, 34.99)
val bookPrices = books.withIndex().associate { (index, book) -> book to prices[index] }
// Print the bookPrices map
// Your code here

Need a hint?

Use println(bookPrices) to display the map.