Go in Action(Manning2015)

SummaryGo in Action introduces the Go language, guiding you from inquisitive developer to Go guru. The book begins by introducing the unique features and concepts of Go. Then, you'll get hands-on experience writing real-world applications including websites and network servers, as well as techniquGo in actionWILLIAM KENNEDYWITH BRIAN KETELSENAND ERIKST MARTINMANNINGSHELTER ISLANDFor online information and ordering of this and other Manning books, please visitwww.manning.com.thepublisheroffersdiscountsonthisbookwhenorderedinquantityFor more information, please contactSpecial sales departmentManning publicC20 Baldwin roadPO BoX 761Shelter island. ny 11964Email:orders@manning.com@2016 by Manning Publications Co. All rights reservedNo part of this publication may be reproduced, stored in a retrieval system, or transmitted, inany form or by means electronic, mechanical, photocopying, or otherwise, without prior writtenpermission of the publisher:Many of the designations used by manufacturers and sellers to distinguish their products areclaimed as trademarks. Where those designations appear in the book, and manningPublications was aware of a trademark claim, the designations have been printed in initial capsor all capo Recognizing the importance of preserving what has been written, it is Manning,'s policy to havethe books we publish printed on acid-free paper, and we exert our best efforts to that endRecognizing also our responsibility to conserve the resources of our planet, Manning bookare printed on paper that is at least 15 percent recycled and processed without the use ofelemental chlorineManning Publications CoDevelopment editor: Jennifer Stout20 Baldwin roadTechnical development editor: Kim ShriPO Box 761Copyeditor: Jodie AllenShelter island.nY 11964Proofreader: Katie tennantechnical proofreader: Jimmy FrascheTypesetter: Dottie marsicoCover designer: Marija TudoISBN9781617991784Printed in the united states of america12345678910-EBM-201918171615brief contents1 Introducing GoGo quick-start 93 Packaging and tooling 394 Arrays, slices, and maps 575 Go's type system 886 Concurrency 128Concurrency patteterns 1588Standard library 1849 Testing and benchmarking 211contents0eU072reface x222acknowledgments xivabout this book xuiabout the cover illustration xixIntroducing Go I1 Solving modern programming challenges with Go 2Development speed 3: Concurrency 3. Go's type system 5Memory management 71.2 Hello, Go 7Introducing the go Playground 81.8 Summary 8Go quick-start 92.1 Program architecture 102.2 Main package Il2.3 Search package 18search go 14. feed. go 22. match. go/default go 262.4 RSS matcher 322.5 Summary 38CONTENTS3 Packaging and tooling 393.1 Packages 40Package-naming conventions 40- Package main 403.2 Imports 42Remote imports 42. Named imports 438.3 init 448.4 USing Go tools 458.5 Going farther with Go developer tools 47go vet47· Go format48· Go documentation483.6 Collaborating with other Go developers 51Creating repositories for sharing 573.7 Dependency management 52Vendoring dependencies 52.Introducing gb 543.8 Summary 56Arrays, slices, and maps 574.1 Array internals and fundamentals 57Internals 58. Declaring and initializing 58. Working witharrays 60: Multidimensional arrays 62. Passing arraysbetween functions 644.2 Slice internals and fundamentals 65Internals 65. Creating and initializing 65. Working withslices 68: Multidimensional slices 79. Passing slices betweenfunctions 804.8 Map internals and fundamentals 81Internals 81. Creating and initializing 83. Working withmaps 84.Passing maps between functions 864.4 Summary 875 Go's type system 885.1 User-defined types 895.2 Methods 925. 3 The nature of types 96Built-in types96· Reference types97· Struct types98CONTENTS5.4 Interfaces 101Standard library 102 Implementation 104 Methodses105· Polymorphi105.5 Type embedding Ill5. 6 Exporting and unexporting identifiers 1195.7 Summary 1276Concurrency 1286.1 Concurrency versus parallelism 1296.2 Goroutines 1326.3 Race conditions 1396.4 Locking shared resources 142Atomic functions 142. Mutexes 1456.5 Channels 147Unbuffered channels 148- Buffered channels 1536.6 Summary 157Concurrency patterns 1587.1 Runner 157.2 Pooling 1677.3Work1777.4 Summary 183Standard library 1848.1 Documentation and source code 1858.2 Logging 187Log package 187. Customized loggers 191Conclusion 1958.3 Encoding/Decoding 196Decoding soN 196. Encoding SON 201Conclusion 2028.4 Input and output 203Writer and reader interfaces 203. Working together 205Simple curl 208 Conclusion 2108.5 Summary 210