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   源码介绍

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GO-IN-ACTION

contents
foreword xi
preface xiii
acknowledgments xiv
about this book xvi
about the cover illustration xix
1
Introducing Go 1
1.1 Solving modern programming challenges with Go 2
Development speed 3
■
Concurrency 3
■
Go’s type system 5
Memory management 7
1.2 Hello, Go 7
Introducing the Go Playground 8
1.3 Summary 8
2
Go quick-start 9
2.1 Program architecture 10
2.2 Main package 11
2.3 Search package 13
search.go 14
■
feed.go 22
■
match.go/default.go 26
2.4 RSS matcher 32
2.5 Summary 38
Licensed to Mark Watson <nordickan@gmail.com>
CONTENTS viii
3
Packaging and tooling 39
3.1 Packages 40
Package-naming conventions 40
■
Package main 40
3.2 Imports 42
Remote imports 42
■
Named imports 43
3.3 init 44
3.4 Using Go tools 45
3.5 Going farther with Go developer tools 47
go vet 47
■
Go format 48
■
Go documentation 48
3.6 Collaborating with other Go developers 51
Creating repositories for sharing 51
3.7 Dependency management 52
Vendoring dependencies 52
■
Introducing gb 54
3.8 Summary 56
4
Arrays, slices, and maps 57
4.1 Array internals and fundamentals 57
Internals 58
■
Declaring and initializing 58
■
Working with
arrays 60
■
Multidimensional arrays 62
■
Passing arrays
between functions 64
4.2 Slice internals and fundamentals 65
Internals 65
■
Creating and initializing 65
■
Working with
slices 68
■
Multidimensional slices 79
■
Passing slices between
functions 80
4.3 Map internals and fundamentals 81
Internals 81
■
Creating and initializing 83
■
Working with
maps 84
■
Passing maps between functions 86
4.4 Summary 87
5
Go’s type system 88
5.1 User-defined types 89
5.2 Methods 92
5.3 The nature of types 96
Built-in types 96
■
Reference types 97
■
Struct types 98
Licensed to Mark Watson <nordickan@gmail.com>
CONTENTS ix
5.4 Interfaces 101
Standard library 102
■
Implementation 104
■
Method
sets 105
■
Polymorphism 109
5.5 Type embedding 111
5.6 Exporting and unexporting identifiers 119
5.7 Summary 127
6
Concurrency 128
6.1 Concurrency versus parallelism 129
6.2 Goroutines 132
6.3 Race conditions 139
6.4 Locking shared resources 142
Atomic functions 142
■
Mutexes 145
6.5 Channels 147
Unbuffered channels 148
■
Buffered channels 153
6.6 Summary 157
7
Concurrency patterns 158
7.1 Runner 158
7.2 Pooling 167
7.3 Work 177
7.4 Summary 183
8
Standard library 184
8.1 Documentation and source code 185
8.2 Logging 187
Log package 187
■
Customized loggers 191
Conclusion 195
8.3 Encoding/Decoding 196
Decoding JSON 196
■
Encoding JSON 201
Conclusion 202
8.4 Input and output 203
Writer and Reader interfaces 203
■
Working together 205
Simple curl 208
■
Conclusion 210
8.5 Summary 210
Licensed to Mark Watson <nordickan@gmail.com>
CONTENTS x
9
Testing and benchmarking 211
9.1 Unit testing 212
Basic unit test 212
■
Table tests 216
■
Mocking calls 219
Testing endpoints 223
9.2 Examples 228
9.3 Benchmarking 232
9.4 Summary 236
index 237