Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

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354 Part III ■ Advanced Addon TechniquesGrouping Events to Avoid Over-ProcessingThe following simple bit of code watches the player’s inventory and warnshim when it falls below a certain threshold. You can use the BAG_UPDATE eventto watch for changes to the player’s bags.if not BagWatchFrame thenBagWatchFrame = CreateFrame(“Frame“)endBagWatchFrame.WARN_LEVEL = 0.2BagWatchFrame.message = “You are running low on bag space!“BagWatchFrame.fullMessage = “Your bags are full!“local function bagWatch_OnEvent(self, event, bag, ...)local maxSlots, freeSlots = 0, 0for idx = 0, 4 domaxSlots = maxSlots + GetContainerNumSlots(idx)freeSlots = freeSlots + GetContainerNumFreeSlots(idx)endlocal percFree = freeSlots / maxSlotslocal msgif percFree == self.percFree then-- Don’t warn the user at the same level more than onceelseif percFree == 0 thenmsg = BagWatchFrame.fullMessageelseif percFree
Chapter 18 ■ Responding to Graphic Updates with OnUpdate 355Figure 18-3: Free slot warning displayed in the RaidWarningFrameThere is a problem with this code that can be seen when using the EquipmentManager. The Equipment Manager is a system that allows you to save multiplegear sets, and switch them with a single button. That’s accomplished by rapidlyequipping (or un-equipping) items as necessary. The Equipment Manager isdisabled by default, but can be enabled on the Controls menu under InterfaceOptions.Depending on your latency to the server, the number of items you areequipping or un-equipping, and the number of slots you have free in yourbags, you may find this code warning you multiple times for the sameequipment change. That is because the BAG_UPDATE event is firing more thanonce in a short period of time. You can use an OnUpdate to help fix this problem,as you see in the next section.Grouping Multiple EventsThe original code can be altered to not immediately trigger the bag scan, butinstead to schedule it for some time in the future using an OnUpdate. Edit thecode as follows, noting the highlighted differences from the previous version:if not BagWatchFrame thenBagWatchFrame = CreateFrame(“Frame“)endBagWatchFrame.THROTTLE = 0.5BagWatchFrame.WARN_LEVEL = 0.2BagWatchFrame.message = “You are running low on bag space!“BagWatchFrame.fullMessage = “Your bags are full!“local function bagWatch_ScanBags(frame)local maxSlots, freeSlots = 0, 0for idx = 0, 4 domaxSlots = maxSlots + GetContainerNumSlots(idx)freeSlots = freeSlots + GetContainerNumFreeSlots(idx)endlocal percFree = freeSlots / maxSlotslocal msgif percFree == frame.percFree then
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A Guide and Reference for Creating
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World of Warcraft® Programming: A
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CreditsAcquisitions EditorScott Mey
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xAcknowledgmentsI’d first like to
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xiiContents at a GlanceChapter 13 R
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xivContentsUsing History to Make Ch
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xviContentsExtending Tables with Me
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xviiiContents## Title: 127## Notes:
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xxContentsInvestigating UIPanelTemp
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xxiiContentsAdding an OnEvent Handl
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xxivContentsPreparing for the Token
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xxviContentsWriting an OnUpdate Fun
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xxviii ContentsSummary 496The Code
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xxxContentsChapter 28 API Categorie
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xxxii ContentsTrade Skill Functions
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xxxiv ContentsRequesting Data Befor
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IntroductionSince World of Warcraft
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Introduction xxxixPart II discusses
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CHAPTER1Programming for Worldof War
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Chapter 1 ■ Programming for World
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CHAPTER2Exploring Lua BasicsLua is
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Chapter 2 ■ Exploring Lua Basics
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40 Part I ■ Learning to ProgramTh
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42 Part I ■ Learning to ProgramEm
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44 Part I ■ Learning to ProgramAs
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CHAPTER4Working with TablesKeeping
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Chapter 4 ■ Working with Tables 5
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CHAPTER5Advanced Functions andContr
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CHAPTER7Learning XMLAs mentioned in
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Chapter 7 ■ Learning XML 113XML T
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Chapter 7 ■ Learning XML 121Summa
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CHAPTER8Anatomy of an AddonAs discu
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Chapter 8 ■ Anatomy of an Addon 1
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CHAPTER9Working with Frames, Widget
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172 Part II ■ Programming in Worl
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CHAPTER12Interacting with WidgetsYo
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CHAPTER14Tracking Damage withCombat
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CHAPTER15Taking Action with SecureT
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CHAPTER22Creating Scroll FramesWhen
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self:SetValueStep(1.0)self:SetValue
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CHAPTER24Scanning and ConstructingT
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CHAPTER25Taking Protected Actionin
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PartIVReferenceIn This PartChapter
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540 Part IV ■ ReferenceThis notat
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542 Part IV ■ ReferenceAPI Meta-T
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544 Part IV ■ ReferenceRAID—Spe
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546 Part IV ■ Referencezero inten
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548 Part IV ■ ReferenceDigits 7-1
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550 Part IV ■ ReferenceRepresents
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552 Part IV ■ Referenceitemdata
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554 Part IV ■ Reference5. Epic (p
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556 Part IV ■ Referencemouseover
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558 Part IV ■ ReferenceConfirmati
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560 Part IV ■ ReferenceThe Muted
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564 Part IV ■ ReferenceUsable fol
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566 Part IV ■ ReferenceAfter call
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568 Part IV ■ ReferenceCalendarCo
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570 Part IV ■ ReferenceReturns:mo
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572 Part IV ■ ReferenceCalendarCo
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574 Part IV ■ ReferenceCalendarDe
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576 Part IV ■ ReferenceinviteType
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578 Part IV ■ ReferenceCalendarEv
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584 Part IV ■ Referencetexture—
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586 Part IV ■ ReferencependingInv
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588 Part IV ■ Referenceday—Day
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590 Part IV ■ ReferenceReturns:..
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592 Part IV ■ ReferenceOnly appli
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594 Part IV ■ ReferenceCanComplai
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596 Part IV ■ ReferenceCanGuildDe
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598 Part IV ■ ReferenceReturns:ca
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600 Part IV ■ ReferenceReturns:en
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602 Part IV ■ ReferenceProtectedP
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604 Part IV ■ ReferenceArguments:
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608 Part IV ■ ReferenceBlizzard U
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610 Part IV ■ ReferenceClearLFGAu
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612 Part IV ■ ReferenceautoReturn
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614 Part IV ■ ReferenceCloseBattl
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616 Part IV ■ ReferenceFires the
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618 Part IV ■ ReferenceCombatLogC
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620 Part IV ■ ReferenceCOMBATLOG_
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622 Part IV ■ ReferenceUsable bet
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624 Part IV ■ ReferenceCreateMacr
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626 Part IV ■ ReferenceDeclineNam
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630 Part IV ■ ReferenceThe list o
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632 Part IV ■ ReferenceEnableSpel
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634 Part IV ■ ReferenceUsable fol
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640 Part IV ■ ReferenceGMSurveySu
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642 Part IV ■ Referencequantity
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644 Part IV ■ ReferenceThe toolti
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646 Part IV ■ Referencelocal acti
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652 Part IV ■ ReferenceGetArenaTe
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654 Part IV ■ ReferenceReturns:in
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656 Part IV ■ ReferencebuyoutPric
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664 Part IV ■ ReferenceExample:--
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666 Part IV ■ Referencebreakenden
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668 Part IV ■ ReferencevehicleY
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670 Part IV ■ ReferenceReturns:ac
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672 Part IV ■ ReferenceReturns:li
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674 Part IV ■ ReferenceGetCVarMin
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676 Part IV ■ ReferenceReturns:ch
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678 Part IV ■ ReferenceGetChatWin
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680 Part IV ■ ReferenceCR_CRIT_TA
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682 Part IV ■ Referenceenable—1
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684 Part IV ■ Reference-- oops, i
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688 Part IV ■ ReferenceReturns:ti
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690 Part IV ■ ReferenceGetCurrent
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692 Part IV ■ ReferencesubType—
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696 Part IV ■ ReferenceoffhandExp
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700 Part IV ■ ReferenceGetGlyphSo
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702 Part IV ■ ReferenceThis funct
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704 Part IV ■ ReferencenumWithdra
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706 Part IV ■ ReferenceGetGuildEv
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708 Part IV ■ ReferenceReturns:ye
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710 Part IV ■ Referencestationery
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712 Part IV ■ Referencetexture—
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714 Part IV ■ ReferenceReturns:di
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716 Part IV ■ ReferenceGetInvento
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718 Part IV ■ ReferenceGetInvento
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720 Part IV ■ ReferenceExample:_,
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724 Part IV ■ Referencefor stat,
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726 Part IV ■ ReferenceReturns:ma
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728 Part IV ■ ReferenceisLeader
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730 Part IV ■ ReferenceGetLatestC
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732 Part IV ■ ReferenceGetLootRol
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734 Part IV ■ ReferenceGetMacroIn
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736 Part IV ■ ReferenceGetMapInfo
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738 Part IV ■ ReferenceNot all pa
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740 Part IV ■ ReferenceitemCount
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742 Part IV ■ ReferenceBREATH—U
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744 Part IV ■ ReferenceChatFrame1
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746 Part IV ■ ReferenceIf the giv
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748 Part IV ■ ReferenceisFull—1
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750 Part IV ■ ReferenceGetNumComp
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752 Part IV ■ ReferenceGetNumFrie
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754 Part IV ■ Referenceindex—In
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756 Part IV ■ ReferenceOnly valid
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758 Part IV ■ ReferenceGetNumSave
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760 Part IV ■ Referenceinspect—
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762 Part IV ■ ReferenceOnly valid
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764 Part IV ■ ReferenceReturns:ch
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766 Part IV ■ ReferenceNote: GetP
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768 Part IV ■ ReferenceReturns:na
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770 Part IV ■ Referencecasting a
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772 Part IV ■ Referenceelseif ( l
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774 Part IV ■ ReferenceGetQuestLo
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782 Part IV ■ Reference“notread
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784 Part IV ■ ReferenceGetRestSta
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786 Part IV ■ ReferenceNote the p
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790 Part IV ■ ReferenceGetSelecte
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792 Part IV ■ ReferenceReturns th
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794 Part IV ■ ReferenceA Bind on
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796 Part IV ■ ReferenceGetSpellCo
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800 Part IV ■ Referencepet—The
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802 Part IV ■ ReferenceReturns:te
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806 Part IV ■ ReferenceExample:Ge
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808 Part IV ■ ReferenceTotem func
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810 Part IV ■ ReferenceGetTradeSk
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812 Part IV ■ ReferenceGetTradeSk
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814 Part IV ■ ReferenceplayerReag
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818 Part IV ■ ReferenceGetTrainer
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820 Part IV ■ ReferenceFor trade
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826 Part IV ■ ReferenceoffHandExp
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846 Part IV ■ ReferenceIsFactionI
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848 Part IV ■ Referenceprint(name
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850 Part IV ■ ReferenceIsInventor
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868 Part IV ■ ReferenceKBQuery_Be
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870 Part IV ■ ReferenceReturns:ca
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874 Part IV ■ ReferenceINSECURE
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876 Part IV ■ ReferenceLOOT_OPENE
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878 Part IV ■ ReferenceMac OS X o
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880 Part IV ■ ReferenceMac OS X o
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882 Part IV ■ ReferenceProtectedM
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886 Part IV ■ ReferencePetRenameR
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890 Part IV ■ ReferencePickupPlay
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898 Part IV ■ ReferenceRemoveChat
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900 Part IV ■ ReferenceRequestBat
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906 Part IV ■ ReferenceOutput inc
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990 Part IV ■ ReferenceUnlike sim
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994 Part IV ■ ReferenceProtectedR
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998 Part IV ■ ReferenceVoiceGetCu
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1002 Part IV ■ Reference’ChatEd
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1006 Part IV ■ ReferenceLua APIgs
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1008 Part IV ■ Referencewill iter
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1010 Part IV ■ ReferenceLua APIRe
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1022 Part IV ■ ReferenceLua APIFo
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1024 Part IV ■ ReferenceLua APIRe
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1026 Part IV ■ ReferenceGetAchiev
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1028 Part IV ■ ReferenceIsUsableA
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1036 Part IV ■ ReferenceGetCVarDe
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1038 Part IV ■ ReferenceCalendarE
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1042 Part IV ■ ReferenceChannelUn
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1044 Part IV ■ ReferenceDoEmote
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1054 Part IV ■ ReferenceGetSelect
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1058 Part IV ■ ReferenceGetGuildT
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1066 Part IV ■ ReferenceIsControl
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1070 Part IV ■ ReferenceLootSlotI
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1074 Part IV ■ ReferenceSecureCmd
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1080 Part IV ■ ReferencePitchUpSt
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1082 Part IV ■ ReferenceParty Fun
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1084 Part IV ■ ReferenceGetPetFoo
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1086 Part IV ■ ReferenceConfirmBi
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1088 Part IV ■ ReferenceUnitChara
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1090 Part IV ■ ReferenceGetGossip
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1092 Part IV ■ ReferenceGetQuestL
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1094 Part IV ■ ReferenceRaid Func
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1096 Part IV ■ Referenceissecure
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1098 Part IV ■ ReferenceGetSocket
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1100 Part IV ■ ReferenceIsAttackS
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1102 Part IV ■ ReferenceGetManaRe
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1104 Part IV ■ ReferenceGetNumTal
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1106 Part IV ■ ReferenceTracking
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1108 Part IV ■ ReferenceGetTradeS
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1110 Part IV ■ ReferenceIsTrainer
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1114 Part IV ■ ReferenceGetCurren
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1118 Part IV ■ ReferenceDisplayCh
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CHAPTER29Widget ReferenceTo respond
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Chapter 29 ■ Widget Reference 112
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1278 Part IV ■ ReferenceADDON_ACT
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1280 Part IV ■ ReferenceCALENDAR_
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1282 Part IV ■ ReferenceCHAT_MSG_
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1284 Part IV ■ ReferenceCORPSE_OU
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1286 Part IV ■ ReferenceGUILDBANK
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1288 Part IV ■ ReferenceKNOWLEDGE
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1290 Part IV ■ ReferenceOPEN_TABA
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1292 Part IV ■ ReferencePLAYER_EN
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1294 Part IV ■ ReferenceQUEST_LOG
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1296 Part IV ■ ReferenceTRADE_POT
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1298 Part IV ■ ReferenceUNIT_PET_
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1300 Part IV ■ ReferenceUPDATE_MA
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PartVAppendixesIn This PartAppendix
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1306 Part V ■ AppendixesUse Meani
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1308 Part V ■ Appendixeshard codi
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1310 Part V ■ AppendixesOrganizat
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1314 Part V ■ Appendixesitself to
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1316 Part V ■ AppendixesTAIL CALL
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1318 Part V ■ AppendixesEach time
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1320 Part V ■ AppendixesEven if y
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1322 Part V ■ AppendixesEach even
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1324 Part V ■ Appendixesthe basic
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1326 Part V ■ AppendixesEntering
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APPENDIXBUtilizing Addon LibrariesW
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Appendix B ■ Utilizing Addon Libr
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1340 Part V ■ AppendixesOne major
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1342 Part V ■ Appendixessvn updat
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1344 Part V ■ AppendixesGit and M
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1346 Part V ■ AppendixesOnce that
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1348 Part V ■ Appendixesremote: a
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1350 Part V ■ Appendixeshave alre
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1352 Part V ■ Appendixesthe other
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1354 Part V ■ Appendixesand open
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IndexAAbandonQuest, 556AbandonSkill
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Index ■ A-B 1359hyperlink, 549-55
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Index ■ B-C 1361BuyPetition, 564B
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Index ■ C-C 1363Lua library funct
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Index ■ C-C 1365storing damage an
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Index ■ D-E 1367dropdown frames,
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Index ■ F-F 1369TabButtonTemplate
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Index ■ G-G 1371GetAchievementNum
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Index ■ G-G 1373GetGameTime, 699G
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Index ■ G-G 1375GetNumLetters(),
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Index ■ G-G 1377GetStatusBarColor
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Index ■ G-I 1379GuildInvite, 832G
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Index ■ I-K 1381IsPlaying(), Anim
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Index ■ L-M 1383Lua interpreterdo
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Index ■ O-O 1385OnClick widget sc
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Index ■ P-R 1387PlaySoundFile, 89
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Index ■ S-S 1389how addon code ca
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Index ■ S-S 1391SetInventoryItem(
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Index ■ S-S 1393overview of, 337S
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Index ■ T-T 1395table.insert, 58-
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Index ■ U-U 1397UnitArmor, 962Uni
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Index ■ W-W 1399WWebLua, 15well-f
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Your secret weapon againstthe Lich
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