Ruby - Modules and Mixins
Which of the following is the correct syntax to include a module named
Greetings inside a class Person?Which of the following is the correct syntax to include a module named Greetings inside a class Person?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall correct syntax for including modules
In Ruby, to add instance methods from a module, useinclude ModuleNameinside the class body without parentheses.Step 2: Check each option
class Person; include Greetings; end usesinclude Greetingscorrectly. class Person; extend Greetings; end usesextendwhich adds class methods, not instance methods. class Person; include(Greetings); end uses parentheses which is not standard syntax. class Person; use Greetings; end usesusewhich is invalid in Ruby.Final Answer:
class Person; include Greetings; end -> Option AQuick Check:
Include syntax = include ModuleName [OK]
Quick Trick: Use 'include ModuleName' without parentheses [OK]
Common Mistakes:
- Using extend instead of include
- Adding parentheses after include
- Using invalid keywords like 'use'
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