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Object???Oriented Programming with Swift 2

You're reading from  Object???Oriented Programming with Swift 2

Product type Book
Published in Jan 2016
Publisher
ISBN-13 9781785885693
Pages 332 pages
Edition 1st Edition
Languages
Author (1):
Gaston C. Hillar Gaston C. Hillar
Profile icon Gaston C. Hillar

Table of Contents (16) Chapters

Object–Oriented Programming with Swift 2
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Objects from the Real World to Playground 2. Structures, Classes, and Instances 3. Encapsulation of Data with Properties 4. Inheritance, Abstraction, and Specialization 5. Contract Programming with Protocols 6. Maximization of Code Reuse with Generic Code 7. Object-Oriented Programming and Functional Programming 8. Extending and Building Object-Oriented Code Exercise Answers Index

Combining initializer requirements in protocols with generic types


We included an initializer requirement when we declared the AnimalProtocol protocol, so we know the necessary arguments to create an instance of any class that conforms to this protocol. We will add a new method that creates an instance of the generic type T and adds it to the party members in Party<T> class.

The following lines show the code for the new createAndAddMember method that receives a name String argument and returns an instance of the generic type T. We add the method to the body after the Party<T: AnimalProtocol where T: Equatable> { public class declaration:

public func createAndAddMember(name: String) -> T {
    let newMember = T(name: name)
    addMember(newMember)
    
    return newMember
}

The method uses the generic type T and passes the name argument to create a new instance called newMember. Then, the code calls the addMember method with newMember as an argument and finally returns the recently...

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