RubyGems repository - Mini Project: Build & Apply

RubyGems Repository

📖 Scenario: You are managing a small collection of Ruby gems with their versions and descriptions. You want to organize this data and display gems that meet a certain version requirement.

🎯 Goal: Build a Ruby program that stores gem information in a hash, sets a minimum version requirement, filters gems that meet this version, and prints their names and versions.

📋 What You'll Learn

Create a hash called gems with gem names as keys and their version and description as values

Create a variable called min_version to hold the minimum version string

Use a select method to filter gems with version greater than or equal to min_version

Print the filtered gems' names and versions

💡 Why This Matters

🌍 Real World

Managing Ruby gems and their versions is common when developing Ruby applications to ensure compatibility and update control.

💼 Career

Understanding how to organize and filter gem data helps in roles like Ruby developer, DevOps engineer, or software maintainer.

1

Create the gems hash

Create a hash called gems with these exact entries: 'rails' => { version: '7.0.4', description: 'Web application framework' }, 'nokogiri' => { version: '1.13.3', description: 'HTML, XML parser' }, and 'devise' => { version: '4.8.1', description: 'Authentication solution' }.

Ruby

# Create the gems hash with the specified entries
# Your code here

Need a hint?

Use a Ruby hash with string keys and nested hashes for version and description.

2

Set the minimum version

Create a variable called min_version and set it to the string '5.0.0'.

Ruby

gems = {
  'rails' => { version: '7.0.4', description: 'Web application framework' },
  'nokogiri' => { version: '1.13.3', description: 'HTML, XML parser' },
  'devise' => { version: '4.8.1', description: 'Authentication solution' }
}
# Set the minimum version to '5.0.0'
# Your code here

Need a hint?

Just assign the string '5.0.0' to min_version.

3

Filter gems by version

Create a variable called filtered_gems that selects gems from gems where the gem's version is greater than or equal to min_version. Use string comparison on the version strings.

Ruby

gems = {
  'rails' => { version: '7.0.4', description: 'Web application framework' },
  'nokogiri' => { version: '1.13.3', description: 'HTML, XML parser' },
  'devise' => { version: '4.8.1', description: 'Authentication solution' }
}

min_version = '5.0.0'

# Select gems with version >= min_version
# Your code here

Need a hint?

Use select with a block comparing info[:version] and min_version.

4

Print filtered gems

Use a for loop with variables name and info to iterate over filtered_gems. Inside the loop, print the gem name and version in the format: "#{name}: #{info[:version]}".

Ruby

gems = {
  'rails' => { version: '7.0.4', description: 'Web application framework' },
  'nokogiri' => { version: '1.13.3', description: 'HTML, XML parser' },
  'devise' => { version: '4.8.1', description: 'Authentication solution' }
}

min_version = '5.0.0'

filtered_gems = gems.select { |name, info| info[:version] >= min_version }

# Print each gem's name and version
# Your code here

Need a hint?

Use a for loop and puts with string interpolation.