Swift - Loops
Which collection types can you use directly in a Swift
for-in loop?Which collection types can you use directly in a Swift for-in loop?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Swift collection types
Swift has arrays, dictionaries, and sets as common collections.Step 2: Check for-in loop compatibility
All these collections conform to the Sequence protocol, so they can be used in for-in loops.Final Answer:
Arrays, dictionaries, and sets -> Option AQuick Check:
for-in loop collections = arrays, dictionaries, sets [OK]
Quick Trick: For-in works with any sequence collection [OK]
Common Mistakes:
- Thinking only arrays work
- Ignoring sets as iterable
- Confusing dictionaries with non-collections
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