AsyncSequence: A Sequence That Awaits Its Next Element
AsyncSequence is like a regular Swift Sequence, but you `await` its next element. It lets you process values that arrive over time, like network data, without blocking. The footgun: iteration suspends, so run it in a `Task` for true concurrency.
Think of AsyncSequence as a lazy collection where getting the next item is an async operation. It lets you use a simple `for await in` loop to process a series of values that arrive over time, like bytes from a network stream or user inputs. This replaces complex callback patterns with clean, linear code. The main footgun is forgetting that iteration suspends execution; if you need other work to happen concurrently, you must explicitly run the loop inside a new `Task`.
Read the original → developer.apple.com
- #swift
- #concurrency
- #ios
- #async/await
Get five bites like this every day.
Tezvyn delivers a daily feed of 60-second tech bites with quizzes to lock in what you learn.