Download The Swift Programming Language by Apple Computer Inc. PDF

By Apple Computer Inc.

This can be the legit advisor and reference for Apple's new quick programming language, intended in its place for the Objective-C programming language.

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Swift is a brand new programming language for growing iOS and OS X apps. speedy builds at the better of C and Objective-C, with out the restrictions of C compatibility. rapid adopts secure programming styles and provides smooth positive aspects to make programming more uncomplicated, extra versatile, and extra enjoyable. Swift’s fresh slate, subsidized via the mature and much-loved Cocoa and Cocoa contact frameworks, is a chance to reimagine how software program improvement works.

This publication provides:
- A travel of the language.
- an in depth consultant delving into each one language feature.
- a proper reference for the language.

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Extra info for The Swift Programming Language

Sample text

3 covers invoking a sequence of methods in parallel, when all the methods are known at the start of the parallel work. 5. Parallel LINQ Problem You have parallel processing to perform on a sequence of data, producing another se‐ quence of data or a summary of that data. Solution Most developers are familiar with LINQ, which you can use to write pull-based calcu‐ lations over sequences. Parallel LINQ (PLINQ) extends this LINQ support with parallel processing. PLINQ works well in streaming scenarios, when you have a sequence of inputs and are producing a sequence of outputs.

Avoiding Context for Continuations Problem When an async method resumes after an await, by default it will resume executing within the same context. This can cause performance problems if that context was a UI context and a large number of async methods are resuming on the UI context. FromSeconds(1)); // This method resumes within the same context. ConfigureAwait(false); // This method discards its context when it resumes. } Discussion Having too many continuations run on the UI thread can cause a performance problem.

This is just an example of using a lock to protect shared state. Sum(); } OK, that was a cheap shot, since PLINQ has built-in support for many common oper‐ ators (such as Sum). Aggregate( seed: 0, func: (sum, item) => sum + item ); } Discussion If you are already using the Parallel class, you may want to use its aggregation support. Otherwise, in most scenarios, the PLINQ support is more expressive and has shorter code. 5 covers the basics of PLINQ. 3. Parallel Invocation Problem You have a number of methods to call in parallel, and these methods are (mostly) in‐ dependent of each other.

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