Functional Thinking_ Paradigm Over Syntax [Ford 2014-07-20].pdf

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Functional Thinking

Neal Ford

Functional Thinking

by Neal Ford

Printed in the United States of America.

Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.

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Editors:

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Production Editor:

Kristen Brown

Copyeditor:

Eileen Cohen

Proofreader:

Jasmine Kwityn

July 2014:

First Edition

Indexer:

Judith McConville

Cover Designer:

Karen Montgomery

Interior Designer:

David Futato

Illustrator:

Rebecca Demarest

Revision History for the First Edition:

2014-06-26:

First release

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for release details.

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herein.

ISBN: 978-1-449-36551-6

[LSI]

Table of Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

1. Why. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Shifting Paradigms

Aligning with Language Trends

Ceding Control to the Language/Runtime

Concision

2. Shift. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

A Common Example

Imperative Processing

Functional Processing

Case Study: Number Classification

Imperative Number Classification

Slightly More Functional Number Classification

Java 8 Number Classifier

Functional Java Number Classifier

Common Building Blocks

Filter

Map

Fold/Reduce

Synonym Suffering

Filter

Map

Fold/Reduce

Iteration to Higher-Order Functions

Closures

3. Cede. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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