[JavaScript.Cookbook(2010.7)].Shelley.Powers.文字版

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1、JavaScriptCookbookJavaScriptCookbookShelleyPowersBeijing•Cambridge•Farnham•Köln•Sebastopol•Taipei•TokyoJavaScriptCookbookbyShelleyPowersCopyright©2010ShelleyPowers.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005G

2、ravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesde

3、partment:800-998-9938orcorporate@oreilly.com.Editor:SimonSt.LaurentIndexer:PotomacIndexing,LLCProductionEditor:AdamZarembaCoverDesigner:KarenMontgomeryCopyeditor:ColleenToporekInteriorDesigner:DavidFutatoProofreader:KielVanHornIllustrator:RobertRomano

4、PrintingHistory:July2010:FirstEdition.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.JavaScriptCookbook,theimageofalesseregret,andrelatedtradedressaretrade-marksofO’ReillyMedia,Inc.Manyofthedesign

5、ationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.,wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentak

6、eninthepreparationofthisbook,thepublisherandauthorassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcon-tainedherein.ISBN:978-0-596-80613-2[SB]1278088163TableofContentsPreface....................................

7、................................xiii1.WorkingwithJavaScriptStrings...........................................11.1ConcatenatingTwoorMoreStrings31.2ConcatenatingaStringandAnotherDataType41.3ConditionallyComparingStrings51.4FindingaSubstringinaString81.5

8、ExtractingaSubstringfromaString91.6CheckingforanExisting,NonemptyString101.7BreakingaKeywordStringintoSeparateKeywords131.8InsertingSpecialCharacters151.9ProcessingIndividualLinesofatextarea161.10TrimmingWhitespacefromtheEndsofaString171.11Lef