Collections Programming Topics for Core Foundation

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1、CollectionsProgrammingTopicsforCoreFoundationContentsIntroduction4OrganizationofThisDocument4CommonCharacteristicsofCollections6BehaviorIsDeterminedbyCallbackFunctions6MostCollectionsOfferMutableandImmutableVariants7TypesofCollections8Arrays8Dictionaries9SetsandBags10Trees10CollectionCustomi

2、zation12CreatingandCopyingCollections13DefiningCustomCollectionCallbacks15GettingtheValuesofCollections20SearchingCollections23WorkingWithMutableCollections25ApplyingProgram-DefinedFunctionstoCollections27CreatingandUsingTreeStructures29CreatingaCFTreeObject29AddingaTreetoitsParent30GettingC

3、hildTrees31OtherOperationsWithCFTreeStructures32DocumentRevisionHistory332011-01-18

4、Copyright©2011AppleInc.AllRightsReserved.2TablesandListingsCreatingandCopyingCollections13Table119Listing1CreatinganimmutableCFArrayobject13Listing2CreatinganimmutableCFDictionaryobject14Listing3CreatingaCFDi

5、ctionaryobjectwithmodifiedpredefinedcallbacks15Listing4CreatingaCFDictionaryobjectwithcustomvalueandkeycallbacks16GettingtheValuesofCollections20Listing1GettingthevaluesinaCFArrayobject20Listing2GettingavalueinaCFDictionaryobject21Listing3UsingaCFSetobjecttouniquevalues21SearchingCollections

6、23Listing1SearchingaCFDictionaryobjectforakey23Listing2SearchingforavalueinaCFArrayobject23WorkingWithMutableCollections25Table1Semanticsofmutablecollectionoperations25Listing1Sortinganarray25ApplyingProgram-DefinedFunctionstoCollections27Listing1Applyingafunctiontoanarray27CreatingandUsingT

7、reeStructures29Listing1CreatingaCFTreeobject30Listing2AddingachildCFTreetoitsparent31Listing3Traversingthechildtreesofaparenttree312011-01-18

8、Copyright©2011AppleInc.AllRightsReserved.3IntroductionCoreFoundationcollectionobjectshelpyoustore,organize,andretrieve“quantities”ofdataofvirtuallyall

9、types.Thistopicdescribesobjectsthatletyougrouptogetherothertypesofobjectsin,forexample,arrays,sets,ordictionaries.DevelopersusingCoreFoundationfortheirbasefunctionalityneedtounderstandhowcollectionswork.OrganizationofThisDocumentInadditiontoorganiz