HowtoUseThisBook
This book is divided into 14 chapters. Chapters 1 through 4 focus on the
fundamentalbuildingblocksofSwift.Chapter1providesahigh-leveloverviewof
language and summarizes its key features. In Chapter 2 you’ll learn about
variables and assignments, language-defined operators, and how to create
commonexpressionsandstatements.Chapter3providesanoverviewofthekey
safeprogrammingelementsoftheSwiftprogramminglanguage,andshowshow
theycanbeusedtomakeyourprogramsmorereliableandbug-free.Chapter4
coverstheSwiftconstructsforcontrollingwhenpartsofaprogramareexecuted
andhowmanytimes
Chapters 5 through 9 build on this introduction by covering Swift’s fundamental
abstractionsforbuildingprogramsofarbitrarycomplexity.Chapter5providesan
overviewoftheSwiftStandardLibrary,acollectionofreusablesoftwareresources
(data types, functions, etc.) available across the language implementation. It
includes a detailed overview of the Standard Library numeric types, strings,
collections, and several of its more common built-in functions. Swift provides
supportforthecreationoftuples,anorderedlistofelements,whichcanbeofany
type.Chapter6providesanoverviewoftuplesandshowshowyoucanusethem
in your code. A Swift function is a named, self-contained group of code that
performsaspecifictask.Chapter7showsyouhowtodevelopandusefunctions.
Chapter8providesanintroductiontoclosures,anunnamed,self-containedgroup
ofcodethatperformsaspecifictaskandalsoallowsaccesstovariablesoutside
of their typicalscope. A namedtype is a user-defined type that is composed of
bothdataandmethodsforoperatingonthisdata.InChapter9you’lllearnhowto
createandusetheenumeration,structure,class,andprotocolnamedtypes.
Chapters 10 through 12 cover more advanced features of Swift. Chapter 10
examines extensions, a language mechanism for adding new functionality (i.e.
types, methods, etc.) to an existing enumeration, structure, class, or protocol.
Genericprogrammingisanadvancedfeaturethatenablesyoutocreatesoftware
that’sparameterizedwithrespecttotypes.Chapter11showsyouhowtocreate
and use Swift generic functions and types. Swift provides language-level
mechanismsthatenableyoutodetect,report,andhandleerrors.InChapter12
you’lllearnhowtoimplementyourcodetomanageruntimeerrorconditionsusing
theSwifterrorhandlingAPIs.
Chapters13-14concludethisbookwithanoverviewoftoolsyoucanusetoget
help while programming with Swift, a list of references to resources and
documentationavailableontheprogramminglanguage,andpointerstoadditional
topicsyou’llwanttoexploreasyougainmoreexperience.
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