Kotlin - Operators and Expressions
You want to check if two data class instances have the same content and also if they are the exact same object. Which Kotlin code correctly does both checks?
You want to check if two data class instances have the same content and also if they are the exact same object. Which Kotlin code correctly does both checks?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand data class equality
Data classes overrideequals()so==checks structural equality (content).Step 2: Use === for referential equality
===checks if both variables point to the same object.Step 3: Match code to requirements
if (obj1 == obj2) println("Same content") if (obj1 === obj2) println("Same object") correctly uses==for content and===for object identity.Final Answer:
Option A correctly checks both content and reference equality -> Option AQuick Check:
Content = ==, Object = === [OK]
Quick Trick: Use == for content, === for object identity [OK]
Common Mistakes:
MISTAKES- Swapping == and === meanings
- Using equals() incorrectly for reference check
- Confusing content and reference equality
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