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Scala Functional Programming Patterns

You're reading from   Scala Functional Programming Patterns Grok and perform effective functional programming in Scala

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781783985845
Length 298 pages
Edition 1st Edition
Languages
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Author (1):
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Atul S. Khot Atul S. Khot
Author Profile Icon Atul S. Khot
Atul S. Khot
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Table of Contents (13) Chapters Close

Preface 1. Grokking the Functional Way 2. Singletons, Factories, and Builders FREE CHAPTER 3. Recursion and Chasing your Own Tail 4. Lazy Sequences – Being Lazy, Being Good 5. Taming Multiple Inheritance with Traits 6. Currying Favors with Your Code 7. Of Visitors and Chains of Responsibilities 8. Traversals – Mapping/Filtering/Folding/Reducing 9. Higher Order Functions 10. Actors and Message Passing 11. It's a Paradigm Shift Index

Chapter 2. Singletons, Factories, and Builders

It may sound funny—and I may be stating the obvious—but everyone needs to be born at some point. Go ahead and have a good laugh at that. It is that obvious. Objects, too, need to be born at some point to do useful work. Objects have a lifetime as well. An object is constructed—and hopefully it does something useful before it eventually dies.

In Java we can see the object such as:

           Point p = new Point(23, 94);

We know what is going on—an object of class point is created; its constructor-invoked p is a reference to this newly created object.

At times, we want explicit control of the object-creation process. There are times when we want to allow creation of only one instance of a class. Creational design patterns deal with object-creation mechanisms. Refer to https://sourcemaking.com/design_patterns/creational_patterns for more information on creational patterns.

Creational patterns help create objects...

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Scala Functional Programming Patterns
Published in: Dec 2015
Publisher:
ISBN-13: 9781783985845
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