Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Refactoring Legacy Applications

Sponsored · SiteGround - Reliable hosting with speed, security, and support you can count on. →
Avatar for Aaron Holbrook Aaron Holbrook
June 10, 2017
Technology
0
110

Refactoring Legacy Applications

Avatar for Aaron Holbrook

Aaron Holbrook

June 10, 2017
Tweet

More Decks by Aaron Holbrook

See All by Aaron Holbrook
Debugging PHP Applications
Avatar for Aaron Holbrook aaronholbrook
0
110
Build a PHP Safety Net: Automated Checks Before You Commit
Avatar for Aaron Holbrook aaronholbrook
0
84
Safe and Happy Deploys Using Automation
Avatar for Aaron Holbrook aaronholbrook
0
210
Introduction to IDEs and Debugging
Avatar for Aaron Holbrook aaronholbrook
0
210
Making WordPress Search Kick-ass with Elasticsearch
Avatar for Aaron Holbrook aaronholbrook
0
1.7k
Static Site to WordPress
Avatar for Aaron Holbrook aaronholbrook
0
150
WordPress is a CMS, DAMMIT!
Avatar for Aaron Holbrook aaronholbrook
7
2.1k
WordPress & Version Control (v2) - WordCamp Chicago 2012
Avatar for Aaron Holbrook aaronholbrook
9
5.6k

Other Decks in Technology

See All in Technology
OWASP Top 10:2025 リリースと 少しの日本語化にまつわる裏話
Avatar for Riotaro OKADA okdt
PRO
3
770
GitLab Duo Agent Platform × AGENTS.md で実現するSpec-Driven Development / GitLab Duo Agent Platform × AGENTS.md
Avatar for Niishi Kubo n11sh1
0
140
茨城の思い出を振り返る ～CDKのセキュリティを添えて～ / 20260201 Mitsutoshi Matsuo
Avatar for SHIFT EVOLVE shift_evolve
PRO
1
290
OCI Database Management サービス詳細
Avatar for oracle4engineer oracle4engineer
PRO
1
7.4k
ブロックテーマでサイトをリニューアルした話 / 2026-01-31 Kansai WordPress Meetup
Avatar for Toro_Unit (Hiroshi Urabe) torounit
0
470
AI駆動PjMの理想像 と現在地 -実践例を添えて-
Avatar for オカムラ masahiro_okamura
1
110
【Oracle Cloud ウェビナー】[Oracle AI Database + AWS] Oracle Database@AWSで広がるクラウドの新たな選択肢とAI時代のデータ戦略
Avatar for oracle4engineer oracle4engineer
PRO
2
150
Oracle Cloud Observability and Management Platform - OCI 運用監視サービス概要 -
Avatar for oracle4engineer oracle4engineer
PRO
2
14k
All About Sansan – for New Global Engineers
Avatar for Sansan, Inc. sansan33
PRO
1
1.3k
変化するコーディングエージェントとの現実的な付き合い方 〜Cursor安定択説と、ツールに依存しない「資産」〜
Avatar for empitsu empitsu
4
1.4k
ZOZOにおけるAI活用の現在 ~開発組織全体での取り組みと試行錯誤~
Avatar for ZOZO Developers zozotech
PRO
5
5.5k
SREじゃなかった僕らがenablingを通じて「SRE実践者」になるまでのリアル / SRE Kaigi 2026
Avatar for AEON aeonpeople
6
2.4k

Featured

See All Featured
Conquering PDFs: document understanding beyond plain text
Avatar for Ines Montani inesmontani
PRO
4
2.3k
Primal Persuasion: How to Engage the Brain for Learning That Lasts
Avatar for Mike Taylor tmiket
0
250
Sam Torres - BigQuery for SEOs
Avatar for Tech SEO Connect techseoconnect
PRO
0
190
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
Avatar for Dan Newman danielanewman
231
22k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
Avatar for panda_program panda_program
122
21k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
Avatar for soudai sone soudai
PRO
196
71k
The innovator’s Mindset - 
Leading Through an Era of Exponential Change - McGill University 2025
Avatar for Jean-Marc De Jonghe jdejongh
PRO
1
93
Tips & Tricks on How to Get Your First Job In Tech
Avatar for Honza Javorek honzajavorek
0
440
Distributed Sagas: A Protocol for Coordinating Microservices
Avatar for Caitie McCaffrey caitiem20
333
22k
Git: the NoSQL Database
Avatar for Brandon Keepers bkeepers
PRO
432
66k
Lightning Talk: Beautiful Slides for Beginners
Avatar for Ines Montani inesmontani
PRO
1
440
10 Git Anti Patterns You Should be Aware of
Avatar for Lemi Orhan Ergin lemiorhan
PRO
659
61k

Transcript

  1. Refactoring Legacy Applications aaronjholbrook aaronjholbrook.com no stock photography was harmed

    in the making of this deck
  2. None
  3. None
  4. None
  5. None
  6. None
  7. None
  8. None

  9. Why Refactor?

  10. Things to be careful of Refactoring just to refactor (superficial

    or unnecessary) Taking on too much at once (spinning plates) Staleness (not shipping) Partial or incomplete refactor Not testing
  11. None

  12. Why are YOU refactoring?

  13. Why I refactor

  14. Comprehension

  15. Maintainability

  16. Simplification

  17. Co n s i s t e n c y

  18. Test Debug Take it slow Simplify Strategies & Techniques

  19. File length File naming File and directory organization Namespace Strategies

    & Techniques

  20. Decouple Single Responsibility Exit Early / Exit Often Abstract complexity

    Strategies & Techniques
  21. None
  22. None

  23. aaronjholbrook aaronjholbrook.com Aaron Holbrook Director of Web Engineering Zeek Interactive