iOS Swift - Concurrency
You want to create an async sequence that emits numbers 1 to 3 with a 1-second delay between each. Which approach correctly implements this?
You want to create an async sequence that emits numbers 1 to 3 with a 1-second delay between each. Which approach correctly implements this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand async delay in AsyncStream
To delay between yields asynchronously, use Task.sleep inside the AsyncStream closure.Step 2: Eliminate synchronous or immediate yield options
Options A, B, and C do not provide asynchronous delays correctly.Final Answer:
Use AsyncStream and call continuation.yield inside Task.sleep for delay -> Option DQuick Check:
Async delay requires Task.sleep inside AsyncStream [OK]
Quick Trick: Use Task.sleep for async delays in AsyncStream yields [OK]
Common Mistakes:
- Using synchronous sleep causing blocking
- Yielding all values immediately
- Using DispatchQueue for synchronous yields
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