The Curious Case of the Async Cafe (PragProg)

A quirky, fast-paced tour of the components of modern concurrency in Swift.


Daniel H Steinberg

Swift’s new async/await family is a language level solution for asynchronous and concurrent code. This book introduces the new keywords and additions to the Swift Standard Library, digs in to how and when you should use them and what pitfalls to avoid. You’ll learn to replace traditional approaches to working with callbacks and concurrency with simpler code that is easier to read and reason about.

Swift’s solution to asynchronous and concurrent code is now part of the language itself. The new syntax, which in the past was complicated, fragmented, or deeply nested, is easier to read and follows a logical flow. With async/await you’ll focus on tasks instead of threads or even queues.

The Curious Case of the Async Cafe is a quirky, fast-paced tour of the components of modern concurrency in Swift: async; await; Tasks; using continuations to replace and wrap delegates and closure-based APIs; AsyncSequences and AsyncStreams; structured concurrency using async let and Task Groups; and, of course, actors.

This work was written and produced entirely by the author. We are proud to be distributing it.

Daniel H Steinberg is the author of more than a dozen books including the best selling books A Combine Kickstart, A SwiftUI Kickstart, A Swift Kickstart, Second Edition, A Functional Programming Kickstart, and Dear Elena. He has written apps for the iPhone and the iPad since the SDKs first appeared and has written programs for the Mac all the way back to System 7.

Daniel presents iOS, Functional Programming, SwiftUI, and Swift training and consults through his company Dim Sum Thinking. When he’s not coding or talking about coding for the Mac, the iPhone, and the iPad he’s probably cooking, baking bread, or hanging out with friends. Details on his training and speaking are on the Dim Sum Thinking website.

Don’t forget you can get 35% off with your Devtalk discount! Just use the coupon code “" at checkout :+1:

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