This is a warm and reassuring book that will equip you to read, understand, and update legacy code in any language. The advice is immediately actionable, and you can start to use it right after reading the chapters. The experience of the author is clearly hard-won; he generously shares it to save you a lot of trouble. The material will leave you ready to take on whatever legacy code you encounter, with a smile on your face. I happily endorse it.

Let's face it - legacy code is everywhere! We can complain or... make it our friend. And this is exactly what Jonathan is offering is his book. With a vivid language, lots of examples and use cases the text will shift your attitude towards legacy code. You'll be equipped with a lot of tools to make your daily job much fun and rewarding.

The Legacy Code Programmer's Toolbox gives actionable advice about how to deal with the sometimes harsh reality of our work. You'll learn how to understand and when to refactor legacy code, and what attitude keeps you sane and productive when facing legacy code. This book is a great read for everyone: Junior developers wondering what is coming for them and how to face it, and seniors still wondering what could have been done differently when that old project came to a screeching halt.

Wow! I read the book in one day. For two reasons. First, it is quite entertaining. Second, it is even more enlightening. Jonathan Boccara wrote a unique book about our day to day life as a professional software developer: Working with legacy code. He shows with many examples, how we should approach, understand, and improve legacy code if necessary. You should read it, because Jonathan's book will give you new, critical insight.

As I read Jonathan's book I found a lot of comfort knowing that it will be a lot easier for many developers coping with understanding & working with legacy code. The book helps you get in the right mindset to deal with legacy code and explores various techniques and tools to help you along the way, with lots of carefully crafted code examples. I enjoyed this book a lot and learned some handy tricks along the way. "Jonathan's toolbox" just became my top recommendation on this subject.

I loved it. It's great material, right up there with classics such as Micheal Feathers' "Working Effectively with Legacy Code". Everyone has to deal with legacy code, often reluctantly so. The mental attitude this book conveys is of great importance. Now, I'm better able to pinpoint and solve mental issues as a lead developer/team lead, and that's brilliant. I'm definitely going to recommend this to all my developer colleagues/friends, regardless of their background -- this is a must read!