Ruby - Inheritance
Which of the following is the correct syntax to check if variable
obj is a kind of Array in Ruby?Which of the following is the correct syntax to check if variable obj is a kind of Array in Ruby?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall method syntax
Bothis_a?andkind_of?require a question mark and parentheses around the class name.Step 2: Check each option
obj.kind_of?(Array) uses correct method name and syntax. Options B and C miss the question mark, and D has incorrect bracket usage.Final Answer:
obj.kind_of?(Array) -> Option BQuick Check:
Correct method syntax includes ? and parentheses [OK]
Quick Trick: Use method? with parentheses: obj.kind_of?(Class) [OK]
Common Mistakes:
- Omitting the question mark in method name
- Using square brackets instead of parentheses
- Confusing is_a and kind_of syntax
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