book

Perl Medic: Transforming Legacy Code

by Peter Scott

March 2004

Intermediate to advanced

336 pages

7h 35m

English

Addison-Wesley Professional

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Perl or perl?Obtaining PerlHistorical PerlWho This Book Is ForTypographical ConventionsFor Further ReferencePerl VersionsPerl 6Acknowledgments
1.1. First Things First1.2. Reasons for Inheritance1.3. What Next?1.4. Observe the Program in Its Natural Habitat1.5. Get Personal1.6. Strictness1.7. Warnings
2.1. Versions2.2. Part or Whole?2.3. Find the Dependencies
3.1. Testing Your Patience3.2. Extreme Testing3.3. An Example Using Test:: Modules3.4. Testing Legacy Code3.5. A Final Encouragement
4.1. Strategizing4.2. Why Are You Doing This?4.3. Style4.4. Comments4.5. Restyling4.6. Variable Renaming4.7. Editing4.8. Line Editing4.9. Antipatterns4.10. Evolution

5.1. Package Variables vs. Lexical Variables5.2. Warnings and Strictness5.3. use strict in Detail5.4. use warnings in Detail5.5. Selective Disabling5.6. Caveat Programmer5.7. Perl Poetry
6.1. Keep It Brief6.2. Cargo Cult Perl6.3. Escaping the Global Variable Trap6.4. Debugging Strategies
7.1. Strategies7.2. Perl 47.3. Perl 5.0007.4. Perl 5.0017.5. Perl 5.0027.6. Perl 5.0037.7. Perl 5.0047.8. Perl 5.0057.9. Perl 5.6.07.10. Perl 5.6.17.11. Perl 5.8.07.12. Perl 5.8.17.13. Perl 5.8.27.14. Perl 5.8.3
8.1. The Case for CPAN8.2. Using CPAN8.3. Improving Code with Modules8.4. Custom Perls
9.1. Static Analysis9.2. Eliminating Superfluous Code9.3. Finding Inefficient Code9.4. Debugging
10.1. Making It Robust10.2. Advanced Brevity10.3. Documentation10.4. Custom Warnings10.5. Version Control System Integration
11.1. The Setup11.2. Triage11.3. Desperately Seeking Sanity11.4. Coming into the 21st Century11.5. Incorporating Modules Effectively, Part 111.6. Incorporating Modules Effectively, Part 211.7. Making It Mature, Part 111.8. Making It Mature, Part 211.9. Making It Mature, Part 311.10. Advanced Modification
12.1. In Conclusion12.2. Perl People12.3. A Final Thought
Tie::Array::BoundedBenchmark::TimeTicksmallprofpp

Content preview from Perl Medic: Transforming Legacy Code

Preface

“Worldwide, there are well over 200 billion lines of software that are fragmented, redundantly defined, hard to decipher, and highly inflexible . . . organizations run the risk of being mired down by a mountain of legacy code.”

— William Ulrich, Legacy Systems: Transformation Strategies

Congratulations! Let’s say you just graduated with a computer science degree and now, bucking the economic trend, you’ve landed a job at a prestigious company with a large information technology department. You’re going to be replacing Bill, a programmer who won the lottery and was not seen or heard from again, save for a postcard from Puerto Vallarta two ...