## GARMIN $ ^{®} $ ## Changing Legacy Code with Confidence: ## Practical Advice for Maintaining and Migrating Working Code ## Part 0: Legacy Code ## Legacy code has value • It works $ ^{*} $ It may currently making the company money • One person's bug is another's critical feature ## The Legacy of Code • Best practices and languages change • Developers cycle through projects • Features Programming Over Time Curated by Titus Winters, Tom Manshreck & Hyrum Wright WORKING EFFECTIVELY WITH LEGACY CODE Michael C. Feathers ![Image](/uploads/documents/a/5/c/8/a5c8c8f7d992e4e9c09fcff0d7828ee7/p19_1

## +24 ## Adventures with Legacy Codebases: Tales of Incremental Improvement ## ROTH MICHAELS Roth Michaels Principal Software Engineer Native Instruments ; } }; https://www.youtube.com/watch?v=90l0hH5-r5A A Case-study in Rewriting a Legacy GUI Library for Real-time Audio Software in Modern C++

 ## Legacy Code ...make sure new code is better ## What is legacy code? • No tests • Lot's of code • Very old • Authors may be gone

that a mistake has been made. - The worst of these transformational projects are so-called “modernization projects”—transformational projects undertaken to bring technology platforms up to date. - There pattern: a way to incrementally modernize a legacy system as defined by Martin Fowler. - Instead of building an entirely new system, we take a small piece of the legacy system and rebuild it in a way that lets the rest of the legacy system. We launch that piece into production and have users use it seamlessly as if it is part of the legacy system. - Then we take another piece out of the legacy system and do the

## +21 ## A Case-study in Rewriting a Legacy GUI Library for Real-time Audio Software in Modern C++ ## ROTH MICHAELS 20 21 October 24-29  ## Glass Properties Making a legacy run-time system compile-time safe ## What do I mean by property system? ## What are properties?

Enterprise AI Adoption = Rising Priority... JP Morgan – End-to-End AI Modernization (2020) ## JP Morgan End-to-End AI Modernization – 2023-2025E, per JP Morgan ![Image](/uploads/documents/f/7/6/1/f76 random baseline or holdout control.' We indicate 2020 as the start year for JP Morgan's AI Modernization (2020 Letter to Shareholders: 'We already extensively use AI, quite successfully, in fraud gaming and Crypto hardware supply chains to serve enterprise AI customers. Oracle, long seen as a legacy IT vendor, has repositioned itself as a GPU-rich cloud platform with AI-specific offerings. Astera

## +24 ## Newer Isn't Always Better: Investigating Legacy Design Trends and Their Modern Replacements ## KATHERINE ROCHA ## $ \textcircled{1} $ $ \textcircled{2} $ $ \textcircled{3} $ $ \textcircled{4} $ \textcircled{381} $ $ \textcircled{382} $ $ \ ## Newer Isn’t Always Better Investigating Legacy Design Trends and Their Modern Replacements Katherine Rocha ## About Me • Software Engineer at

goals • Voting Page → Features • TECHNICAL DEPT → CLEANUP WORK • PREPARATION → REFACTORING, MODERNIZATION ## V ote and Prioritize This mini-application allows you to browse and vote on new features for COMPILER API HAS NO NOTATION ABOUT CLOSING/DISPOSING → Add a close method that should be called ## MODERNIZATION • INCREASED MINIMUM NODE.JS VERSION TO 8 • NEW DATA-STRUCTURES • ARRAYS → Sets • OBJECTS →

important complement and optimization for C++11, and C++20 brings this language to the door of modernization. The extended features of all these new standards are integrated into the C++ language and infuse introduces many features into traditional C++ which bring the entire language to a new level of modernization. Modern C++ not only enhances the usability of the C++ language itself, but the modification of

streamlining and improving the defense acquisition process The Section 809 Panel learned that modernization requirements for defense business systems (DBS) are subject to nine approval layers. Accordingly

ents/4/2/1/1/42112a217879580afde61d7e9c46d5c0/p1_1.jpg) Transformation: Transformation and modernization projects are exactly what IT leaders must avoid; continuously transforming and modernizing the