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Mastering Go – Third Edition

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
4.6 (16)
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Mastering Go – Third Edition

Mastering Go – Third Edition

4.6 (16)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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14
Other Books You May Enjoy
15
Index

Pointers

Go has support for pointers but not for pointer arithmetic, which is the cause of many bugs and errors in programming languages like C. A pointer is the memory address of a variable. You need to dereference a pointer in order to get its value—dereferencing is performed using the * character in front of the pointer variable. Additionally, you can get the memory address of a normal variable using an & in front of it.

The next diagram shows the difference between a pointer to an int and an int variable.

A picture containing text, screenshot, rectangle, font  Description automatically generated

Figure 2.4: An int variable and a pointer to an int

If a pointer variable points to an existing regular variable, then any changes you make to the stored value using the pointer variable will modify the regular variable.

The format and the values of memory addresses might be different between different machines, different operating systems, and different architectures.

You might ask, what is the point of using pointers when there...

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Mastering Go – Third Edition
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