Array sorting and reversing in Ruby - Mini Project: Build & Apply

Array sorting and reversing

📖 Scenario: You work in a small bookstore. You have a list of book titles that customers want to buy. You want to organize this list to make it easier to find books.

🎯 Goal: You will create a list of book titles, then sort them alphabetically, and finally reverse the order to see the list from Z to A.

📋 What You'll Learn

Create an array called books with the exact titles: 'Ruby Basics', 'Learn Rails', 'JavaScript Guide', 'Python Essentials', 'Data Science'

Create a variable called sorted_books that holds the books array sorted alphabetically

Create a variable called reversed_books that holds the sorted_books array reversed

Print the reversed_books array

💡 Why This Matters

🌍 Real World

Sorting and reversing lists is common when organizing data like product names, customer lists, or any collection of items.

💼 Career

Many programming jobs require you to manipulate lists and arrays efficiently to prepare data for display or further processing.

1

Create the initial array of book titles

Create an array called books with these exact titles: 'Ruby Basics', 'Learn Rails', 'JavaScript Guide', 'Python Essentials', 'Data Science'

Ruby

# Create the array called books with the given titles
# Your code here

Need a hint?

Use square brackets [] to create an array and separate each title with commas.

2

Sort the array alphabetically

Create a variable called sorted_books that holds the books array sorted alphabetically using the sort method

Ruby

books = ['Ruby Basics', 'Learn Rails', 'JavaScript Guide', 'Python Essentials', 'Data Science']
# Create sorted_books by sorting books alphabetically
# Your code here

Need a hint?

Use sorted_books = books.sort to get a new sorted array.

3

Reverse the sorted array

Create a variable called reversed_books that holds the sorted_books array reversed using the reverse method

Ruby

books = ['Ruby Basics', 'Learn Rails', 'JavaScript Guide', 'Python Essentials', 'Data Science']
sorted_books = books.sort
# Create reversed_books by reversing sorted_books
# Your code here

Need a hint?

Use reversed_books = sorted_books.reverse to reverse the sorted list.

4

Print the reversed array

Print the reversed_books array using puts

Ruby

books = ['Ruby Basics', 'Learn Rails', 'JavaScript Guide', 'Python Essentials', 'Data Science']
sorted_books = books.sort
reversed_books = sorted_books.reverse
# Print reversed_books
# Your code here

Need a hint?

Use puts reversed_books to print each book title on its own line.