Gemfile for project dependencies in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the source for gems in a Gemfile.

Ruby

source [1]

Drag options to blanks, or click blank then click option'

A"https://google.com"

B"http://example.com"

C"gemsource"

D"https://rubygems.org"

Attempts:

3 left

💡 Hint

Common Mistakes

Using an incorrect or non-existent URL as the source.

Forgetting the quotes around the URL.

The source line in a Gemfile tells Bundler where to look for gems. The official RubyGems source is "https://rubygems.org".

2fill in blank

medium

Complete the code to add the 'rails' gem with version '~> 7.0' in the Gemfile.

Ruby

gem 'rails', [1]

Drag options to blanks, or click blank then click option'

A'~> 7.0'

B'= 7.0'

C'>= 7.0'

D'< 7.0'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' which locks to exactly that version.

Using '<' which restricts to lower versions.

The ~> operator means 'compatible with version', so '~> 7.0' allows updates that do not change the major version.

3fill in blank

hard

Fix the error in the Gemfile line to add the 'nokogiri' gem only for the development group.

Ruby

group :development do
  gem [1]
end

Drag options to blanks, or click blank then click option'

A'nokogiri', '~> 1.13'

B'nokogiri', group: :development

C'nokogiri'

D'nokogiri', require: false

Attempts:

3 left

💡 Hint

Common Mistakes

Adding group option inside the group block causing redundancy.

Forgetting to put the gem name in quotes.

Inside a group :development do ... end block, you only need to specify the gem name. The group is already set by the block.

4fill in blank

hard

Fill both blanks to add the 'rspec' gem only for the test group with version '~> 3.10'.

Ruby

group [1] do
  gem 'rspec', [2]
end

Drag options to blanks, or click blank then click option'

A:test

B'~> 3.10'

D:development

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong group symbol like :development.

Omitting quotes around the version string.

The group :test do ... end block scopes gems to the test environment. The version string '~> 3.10' specifies compatible versions starting from 3.10.

5fill in blank

hard

Fill all three blanks to add the 'pg' gem for production group with version '>= 1.2', and disable automatic require.

Ruby

group [1] do
  gem 'pg', [2], [3]
end

Drag options to blanks, or click blank then click option'

A:production

Brequire: false

C>= '1.2'

D'>= 1.2'

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted version strings.

Placing options in wrong order or syntax.

The group :production do ... end block scopes gems to production. The version string '>= 1.2' specifies minimum version 1.2. The option require: false disables automatic loading of the gem.