Bird
0
0

What does the enumerated() method do when used on an array in Swift?

easy📝 Conceptual Q11 of 15
Swift - Collections
What does the enumerated() method do when used on an array in Swift?
AIt provides both the index and the value of each element during iteration.
BIt reverses the order of the array elements.
CIt filters out duplicate elements from the array.
DIt sorts the array in ascending order.
Step-by-Step Solution
Solution:
  1. Step 1: Understand the purpose of enumerated()

    The enumerated() method returns a sequence of pairs (index, value) for each element in the array.
  2. Step 2: Identify what is returned during iteration

    Each iteration gives you the position (index) and the element itself (value), allowing you to use both.
  3. Final Answer:

    It provides both the index and the value of each element during iteration. -> Option A
  4. Quick Check:

    enumerated() = index + value [OK]
Quick Trick: Remember: enumerated() gives index and item together [OK]
Common Mistakes:
  • Thinking enumerated() changes array order
  • Believing enumerated() filters or sorts elements
  • Confusing enumerated() with map or filter

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Swift Quizzes