An Introduction to Programming in Go

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1、AnIntroductiontoProgramminginGoCopyright©2012byCalebDoxseyAllrightsreserved.Nopartofthisbookmaybereproducedortransmittedinanyformorbyanymeans,electronicormechanical,includingphotocopying,recording,orbyanyinformationstorageandretrievalsystemwithoutthewrittenpermiss

2、ionoftheauthor,exceptwherepermittedbylaw.ISBN:978-1478355823CoverartbyAbigailDoxseyAnderson.PortionsofthistextarereproducedfromworkcreatedandsharedbyGoogleandusedaccordingtotermsdescribedintheCreativeCommons3.0AttributionLicense.Contents1GettingStarted11.1Filesand

3、Folders21.2TheTerminal51.3TextEditors91.4GoTools132YourFirstProgram152.1HowtoReadaGoProgram173Types233.1Numbers243.2Strings293.3Booleans314Variables354.1HowtoNameaVariable394.2Scope404.3Constants434.4DefiningMultipleVariables444.5AnExampleProgram455ControlStructur

4、es475.1For485.2If515.3Switch556Arrays,SlicesandMaps586.1Arrays586.2Slices646.3Maps677Functions767.1YourSecondFunction777.2ReturningMultipleValues827.3VariadicFunctions827.4Closure847.5Recursion867.6Defer,Panic&Recover888Pointers928.1The*and&operators938.2new949Str

5、uctsandInterfaces979.1Structs989.2Methods1019.3Interfaces10410Concurrency10810.1Goroutines10810.2Channels11111Packages12011.1CreatingPackages12111.2Documentation12412Testing12713TheCorePackages13213.1Strings13213.2Input/Output13413.3Files&Folders13513.4Errors14013

6、.5Containers&Sort14113.6Hashes&Cryptography14413.7Servers14713.8ParsingCommandLineArguments15513.9SynchronizationPrimitives15614NextSteps15914.1StudytheMasters15914.2MakeSomething16014.3TeamUp1611GettingStartedComputerprogrammingistheart,craftandscienceofwritingpr

7、ogramswhichdefinehowcomputersoperate.Thisbookwillteachyouhowtowritecomputerpro-gramsusingaprogramminglanguagedesignedbyGooglenamedGo.Goisageneralpurposeprogramminglanguagewithadvancedfeaturesandacleansyntax.Becauseofitswideavailabilityonavarietyofplatforms,itsrobu

8、stwell-documentedcommonlibrary,anditsfocusongoodsoftwareengineeringprinciples,Goisanideallanguagetolearnasyourfirstprogramminglanguage.Theprocessweuseto