How can you combine two async sequences streamA and streamB to produce a single async sequence emitting all values from both?

hard📝 Application Q9 of 15

iOS Swift - Concurrency

How can you combine two async sequences streamA and streamB to produce a single async sequence emitting all values from both?

AUse a synchronous for loop to iterate both streams and append results

BUse AsyncStream to merge both streams by yielding values from each

CCall for await on streamA then streamB sequentially without merging

DConvert both streams to arrays then concatenate synchronously

Step-by-Step Solution

Solution:

Step 1: Understand async sequence merging
To merge two async sequences, create a new AsyncStream that yields values from both asynchronously.
Step 2: Eliminate synchronous or sequential options
Options B, C, and D do not merge asynchronously or produce a combined async sequence.
Final Answer:
Use AsyncStream to merge both streams by yielding values from each -> Option B
Quick Check:
Async merge requires AsyncStream yielding both sources [OK]

Quick Trick: Merge async sequences by yielding from both in AsyncStream [OK]

Common Mistakes:

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