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The Go Programming Language is the authoritative resource for any programmer who wants to learn Go. It shows how to write clear and idiomatic Go to solve real-world problems. The book does not assume prior knowledge of Go nor experience with any specific language, so you'll find it accessible whether you're most comfortable with JavaScript, Ruby, Python, Java, or C++.

 

The first chapter is a tutorial on the basic concepts of Go, introduced through programs for file I/O and text processing, simple graphics, and web clients and servers.

Early chapters cover the structural elements of Go programs: syntax, control flow, data types, and the organization of a program into packages, files, and functions. The examples illustrate many packages from the standard library and show how to create new ones of your own. Later chapters explain the package mechanism in more detail, and how to build, test, and maintain projects using the go tool.

The chapters on methods and interfaces introduce Go's unconventional approach to object-oriented programming, in which methods can be declared on any type and interfaces are implicitly satisfied. They explain the key principles of encapsulation, composition, and substitutability using realistic examples.

Two chapters on concurrency present in-depth approaches to this increasingly important topic. The first, which covers the basic mechanisms of goroutines and channels, illustrates the style known as communicating sequential processes for which Go is renowned. The second covers more traditional aspects of concurrency with shared variables. These chapters provide a solid foundation for programmers encountering concurrency for the first time.

The final two chapters explore lower-level features of Go. One covers the art of metaprogramming using reflection. The other shows how to use the unsafe package to step outside the type system for special situations, and how to use the cgo tool to create Go bindings for C libraries.

 

The book features hundreds of interesting and practical examples of well-written Go code that cover the whole language, its most important packages, and a wide range of applications. Each chapter has exercises to test your understanding and explore extensions and alternatives. Source code is freely available for download from http://gopl.io/ and may be conveniently fetched, built, and installed using the go get command.

 

Go may be our generation's most important new programming language. It is exceptionally expressive, highly efficient in both compilation and execution, and enables the development of extremely reliable and robust programs. It shares the same spirit programmers once found in C: it helps serious professional programmers achieve maximum effect with minimum means. Now, Go shares something else with C, too. Brian Kernighan, who wrote the world's most respected and useful C primer for working programmers, has just done the same for Go. Together with Google Go insider Alan Donovan, Kernighan explains what Go does and doesn't borrow from C ... the great ideas it borrows from other modern languages ... and how it avoids features that lead to unnecessary complexity and unreliable code. Throughout, their short, carefully-crafted code examples demonstrate today's most effective Go idioms, so you can start using Go effectively right from the beginning, and quickly take advantage of its full power. All code has been extensively reviewed by Go's creators at Google for both completeness and accuracy

 

Tutorial -- Program structure -- Basic data types -- Composite types -- Functions -- Methods -- Interfaces -- Goroutines and channels -- Concurrency with shared variables -- Packages and the Go tool -- Testing -- Reflection -- Low-level programming