ProgramminginGo Developer’s Library Series Visit developers-library for a complete list of available products T he praDeveloper’s Library Seriescticing programmers with uniq from Addison-Wesley provides ue, high-quality references and tutorials on the latest programming languages and technologies they use in their daily work. All books in the Developer’s Library are written by expert technology practitioners who are exceptionally skilled at organizing and presenting information in a way that’s useful for other programmers. Developer’s Library books cover a wide range of topics, from open- source programming languages and databases, Linux programming, Microsoft, and Java, to Web development, social networking platforms, Mac/iPhone programming, and Android programming. ProgramminginGo CreatingApplicationsforthe21stCentury MarkSummer?eld UpperSaddleRiver,NJ·Boston·Indianapolis·SanFrancisco pNewYork·Toronto·Montreal·London·Munich·Paris·Madridp Capetown·Sydney·Tokyo·Singapore·MexicoCity Many of the designationsused by manufacturersand sellersto distinguish their productsare claimed as trademarks. Where those designationsappear in this book,and the publisher wasaware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The author and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with o