Array creation methods in Ruby - Mini Project: Build & Apply

Array creation methods

📖 Scenario: You are organizing a small library and want to keep track of book titles using arrays in Ruby.

🎯 Goal: Build a Ruby program that creates arrays of book titles using different array creation methods.

📋 What You'll Learn

Create an array called books with three specific book titles.

Create a variable called empty_books that holds an empty array.

Create an array called default_books with 3 elements, each set to the string 'Unknown'.

Print the contents of all three arrays.

💡 Why This Matters

🌍 Real World

Arrays are used to store lists of items like book titles, names, or numbers in many programs.

💼 Career

Knowing how to create and manage arrays is essential for software development, data processing, and scripting tasks.

1

Create an array with book titles

Create an array called books with these exact book titles: 'The Hobbit', '1984', and 'Brave New World'.

Ruby

# Create an array called books with the titles 'The Hobbit', '1984', and 'Brave New World'
# Your code here

Need a hint?

Use square brackets [] to create an array with the given strings separated by commas.

2

Create an empty array

Create a variable called empty_books and set it to an empty array using [].

Ruby

books = ['The Hobbit', '1984', 'Brave New World']
# Create an empty array called empty_books
# Your code here

Need a hint?

Use empty square brackets [] to create an empty array.

3

Create an array with default values

Create an array called default_books with 3 elements, each set to the string 'Unknown', using the Array.new method.

Ruby

books = ['The Hobbit', '1984', 'Brave New World']
empty_books = []
# Create an array called default_books with 3 'Unknown' elements using Array.new
# Your code here

Need a hint?

Use Array.new(3, 'Unknown') to create an array with 3 copies of 'Unknown'.

4

Print all arrays

Print the arrays books, empty_books, and default_books each on its own line using puts.

Ruby

books = ['The Hobbit', '1984', 'Brave New World']
empty_books = []
default_books = Array.new(3, 'Unknown')
# Print books, empty_books, and default_books each on its own line
# Your code here

Need a hint?

Use puts array.inspect to print the array contents clearly.