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Learning Qlik Sense: The Official Guide

You're reading from   Learning Qlik Sense: The Official Guide Get to grips with the vision of Qlik Sense for next generation business intelligence and data discovery

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Product type Paperback
Published in Feb 2015
Publisher
ISBN-13 9781782173359
Length 230 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (14) Chapters Close

Preface 1. Coding with C++ FREE CHAPTER 2. Variables and Memory 3. If, Else, and Switch 4. Looping 5. Functions and Macros 6. Objects, Classes, and Inheritance 7. Dynamic Memory Allocation 8. Actors and Pawns 9. Templates and Commonly Used Containers 10. Inventory System and Pickup Items 11. Monsters 12. Spell Book Index

Multiple inheritance

Not everything multiple is as good as it sounds. Multiple inheritance is when a derived class inherits from more than one base class. Usually, this works without a hitch if the multiple base classes we are inheriting from are completely unrelated.

For example, we can have a class Window that inherits from the SoundManager and GraphicsManager base classes. If SoundManager provides a member function playSound() and GraphicsManager provides a member function drawSprite(), then the Window class will be able to use those additional capabilities without a hitch.

Multiple inheritance

Game Window inheriting from Sound Man and Graphics Man means Game Window will have both sets of capabilities

However, multiple inheritance can have negative consequences. Say we want to create a class Mule that derives from both the Donkey and Horse classes. The Donkey and Horse classes, however, both inherit from the base class Mammal. We instantly have an issue! If we were to call mule.talk(), but mule does not override...

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