Clean ABAP - Haeuptle, Klaus

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Auteur(s) : Haeuptle, Klaus - Hoffmann, Florian - Jordão, Rodrigo - Martin, Michel - Ravinarayan, Anagha - Westerholz, Kai

Editeur : Rheinwerk Publishing Inc.

Langue : Anglais

Parution : 01/12/2020

Format : Moyen, de 350g à 1kg

Nombre de pages : 351

Expédition : 880

Dimensions : 26.0 x 18.2 x 2.5

ISBN : 1493220268

Résumé :

ABAP developers, are you looking to clean up your code? Then pick up this official companion to the Clean ABAP GitHub repository. This book is brimming with best practices, straight from the experts, to help you write effective ABAP code. Start by learning when to apply each clean ABAP practice. Then, dive into detailed code examples and explanations for using classes, methods, names, variables, internal tables, and more. From writing code to troubleshooting and testing, this is your complete style guide!

In this book, you'll learn about: a. Clean ABAP Concepts
What is clean ABAP and why is it important to write clean code? Understand clean ABAP concepts with insight from the experts, including special considerations for legacy code and performance. b. Best Practices Walk through the what, why, and how behind clean ABAP best practices. Learn to improve your code, including using classes and interfaces appropriately, handling method design and control flow, designing and running unit tests, and much more. c. Practical Examples See clean ABAP practices in action! Improve your understanding of how to write effective code. Use detailed examples for each best practice that demonstrate the difference between clean and messy code. Highlights include: 1) Classes and interfaces 2) Methods 3) Names 4) Variables and literals 5) Internal tables 6) Control flow 7) Comments 8) Formatting 9) Error handling 10) Unit testing 11) Packages

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Biographie:
... Preface ... 17

... Who This Book Is For ... 17

... How This Book Is Organized ... 17

... Acknowledgments ... 19

... Conclusion ... 21

1 ... Introduction ... 23

1.1 ... What Is Clean ABAP? ... 23

1.2 ... How to Get Started with Clean ABAP ... 26

1.3 ... How to Handle Legacy Code ... 26

1.4 ... How to Check Code Automatically ... 28

1.5 ... How Does Clean ABAP Relate to Other Guides? ... 29

1.6 ... How to Engage with the Clean ABAP Community ... 30

1.7 ... Summary ... 31

2 ... The ABAP Language ... 33

2.1 ... Mind Legacy Code ... 33

2.2 ... Mind Performance ... 35

2.3 ... Prefer Object Orientation to Procedural Programming ... 37

2.4 ... Favor Functional Language Constructs over Procedural Language Constructs ... 43

2.5 ... Avoid Obsolete Language Elements ... 46

2.6 ... Use Design Patterns Wisely ... 48

2.7 ... Summary ... 50

3 ... Classes and Interfaces ... 51

3.1 ... Object Orientation ... 51

3.2 ... Scope and Visibility ... 76

3.3 ... Constructors ... 83

3.4 ... Summary ... 93

4 ... Methods ... 95

4.1 ... Object-Oriented Programming ... 95

4.2 ... Parameters ... 102

4.3 ... Method Body ... 115

4.4 ... Calling Methods ... 125

4.5 ... Summary ... 130

5 ... Names ... 133

5.1 ... Good Naming ... 133

5.2 ... ABAP Peculiarities ... 138

5.3 ... Affixes: Prefixes, Suffixes, and Infixes ... 140

5.4 ... Dealing with Legacy Code ... 142

5.5 ... Summary ... 143

6 ... Variables and Literals ... 145

6.1 ... Variables ... 145

6.2 ... Constants ... 152

6.3 ... Strings ... 160

6.4 ... Booleans ... 161

6.5 ... Regular Expressions ... 164

6.6 ... REDUCE ... 166

6.7 ... Summary ... 168

7 ... Internal Tables ... 171

7.1 ... Using the Right Table Category ... 171

7.2 ... Avoiding DEFAULT KEY ... 173

7.3 ... INSERT INTO TABLE and APPEND TO ... 174

7.4 ... Verifying the Existence of a Row ... 176

7.5 ... Retrieving Table Contents ... 177

7.6 ... LOOP AT WHERE and Nested IF ... 179

7.7 ... Identifying Unnecessary Table Reads ... 180

7.8 ... Block Processing of Table Rows and Single Row Operations ... 181

7.9 ... DESCRIBE TABLE and Table Function LINES ... 182

7.10 ... Summary ... 183

8 ... Control Flow ... 185

8.1 ... IFs ... 185

8.2 ... Nesting Depth ... 190

8.3 ... Conditions ... 190

8.4 ... CASE ... 196

8.5 ... Do 1 Times ... 200

8.6 ... Summary ... 203

9 ... Comments ... 205

9.1 ... Express Yourself in Code ... 205

9.2 ... Comment Placement and Usage ... 207

9.3 ... Comments to Avoid ... 208

9.4 ... FIXME, TODO, and XXX Comments ... 211

9.5 ... Special Comments: ABAP Doc, Pragmas, and Pseudo Comments ... 212

9.6 ... Summary ... 214

10 ... Formatting ... 215

10.1 ... Consistency in Coding Style ... 216

10.2 ... Optimizing for Reading ... 216

10.3 ... The Pretty Printer ... 217

10.4 ... Number of Statements Per Line ... 218

10.5 ... Line Length ... 219

10.6 ... Condensing the Code ... 220

10.7 ... Blank Lines ... 220

10.8 ... Alignment of Assignment Statements ... 221

10.9 ... Alignment ...

Sommaire:
... Preface ... 17

... Who This Book Is For ... 17

... How This Book Is Organized ... 17

... Acknowledgments ... 19

... Conclusion ... 21

1 ... Introduction ... 23

1.1 ... What Is Clean ABAP? ... 23

1.2 ... How to Get Started with Clean ABAP ... 26

1.3 ... How to Handle Legacy Code ... 26

1.4 ... How to Check Code Automatically ... 28

1.5 ... How Does Clean ABAP Relate to Other Guides? ... 29

1.6 ... How to Engage with the Clean ABAP Community ... 30

1.7 ... Summary ... 31

2 ... The ABAP Language ... 33

2.1 ... Mind Legacy Code ... 33

2.2 ... Mind Performance ... 35

2.3 ... Prefer Object Orientation to Procedural Programming ... 37

2.4 ... Favor Functional Language Constructs over Procedural Language Constructs ... 43

2.5 ... Avoid Obsolete Language Elements ... 46

2.6 ... Use Design Patterns Wisely ... 48

2.7 ... Summary ... 50

3 ... Classes and Interfaces ... 51

3.1 ... Object Orientation ... 51

3.2 ... Scope and Visibility ... 76

3.3 ... Constructors ... 83

3.4 ... Summary ... 93

4 ... Methods ... 95

4.1 ... Object-Oriented Programming ... 95

4.2 ... Parameters ... 102

4.3 ... Method Body ... 115

4.4 ... Calling Methods ... 125

4.5 ... Summary ... 130

5 ... Names ... 133

5.1 ... Good Naming ... 133

5.2 ... ABAP Peculiarities ... 138

5.3 ... Affixes: Prefixes, Suffixes, and Infixes ... 140

5.4 ... Dealing with Legacy Code ... 142

5.5 ... Summary ... 143

6 ... Variables and Literals ... 145

6.1 ... Variables ... 145

6.2 ... Constants ... 152

6.3 ... Strings ... 160

6.4 ... Booleans ... 161

6.5 ... Regular Expressions ... 164

6.6 ... REDUCE ... 166

6.7 ... Summary ... 168

7 ... Internal Tables ... 171

7.1 ... Using the Right Table Category ... 171

7.2 ... Avoiding DEFAULT KEY ... 173

7.3 ... INSERT INTO TABLE and APPEND TO ... 174

7.4 ... Verifying the Existence of a Row ... 176

7.5 ... Retrieving Table Contents ... 177

7.6 ... LOOP AT WHERE and Nested IF ... 179

7.7 ... Identifying Unnecessary Table Reads ... 180

7.8 ... Block Processing of Table Rows and Single Row Operations ... 181

7.9 ... DESCRIBE TABLE and Table Function LINES ... 182

7.10 ... Summary ... 183

8 ... Control Flow ... 185

8.1 ... IFs ... 185

8.2 ... Nesting Depth ... 190

8.3 ... Conditions ... 190

8.4 ... CASE ... 196

8.5 ... Do 1 Times ... 200

8.6 ... Summary ... 203

9 ... Comments ... 205

9.1 ... Express Yourself in Code ... 205

9.2 ... Comment Placement and Usage ... 207

9.3 ... Comments to Avoid ... 208

9.4 ... FIXME, TODO, and XXX Comments ... 211

9.5 ... Special Comments: ABAP Doc, Pragmas, and Pseudo Comments ... 212

9.6 ... Summary ... 214

10 ... Formatting ... 215

10.1 ... Consistency in Coding Style ... 216

10.2 ... Optimizing for Reading ... 216

10.3 ... The Pretty Printer ... 217

10.4 ... Number of Statements Per Line ... 218

10.5 ... Line Length ... 219

10.6 ... Condensing the Code ... 220

10.7 ... Blank Lines ... 220

10.8 ... Alignment of Assignment Statements ... 221

10.9 ... Alignment ...