Kotlin - Data Types
Given a list of Strings, how can you create a new list where each String is converted to uppercase, respecting String immutability?
Given a list of Strings, how can you create a new list where each String is converted to uppercase, respecting String immutability?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how to transform list elements immutably
Use map to create a new list with transformed elements.Step 2: Check each option for correctness
val upperList = list.map { it.toUpperCase() } correctly uses map to return new uppercase Strings. list.forEach { it.toUpperCase() } calls toUpperCase but ignores result. list.map { it.toUpperCase() = it } has invalid assignment inside lambda. list.replaceAll { it.toUpperCase() } uses non-existent replaceAll on list.Final Answer:
val upperList = list.map { it.toUpperCase() } -> Option CQuick Check:
Use map to transform list immutably [OK]
Quick Trick: Use map to create new list with transformed Strings [OK]
Common Mistakes:
MISTAKES- Using forEach without capturing results
- Trying to assign inside lambda
- Using non-existent list methods
Master "Data Types" in Kotlin
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Kotlin Quizzes