Sandi metz refactoring book

So, i finally gave them some rules and the rules are, and this is painting a big target on me to give you these rules. Therapeutic refactoring a story about taking complicated, untested code and changing it in small, safe steps to make it easier to understand. Agileventures is a project incubator that stimulates and supports development of social innovations, open source and free software. It states that two instances of similar code dont require refactoring, but when similar code is used three times, it. Sandi metz has 30 years of experience working on projects that survived to grow and change. Everything you need to know about objectoriented programming is hidden inside of 99 bottles of beer, and sandi metz and i have written the book to prove it. Sandi metz book on objectoriented design is well worth the read. The act of refactoring is so deeply intertwined with the ideas of ood that they are impossible to separate. From there we get a bit more philosophical and explore some ideas about how to approach refactoring someone elses code with appreciation for the limitations they likely faced. Youll discover the four parts of a method, and how to use those parts to construct a narrative. Some of the talks are closely tied to ruby on rails, but most refactoring techniques are often language agnostic, so even if youre not in the ruby world, dont hesitate to watch them.

Sandi is the author of practical objectoriented design in ruby. Sandi metz and katrina owen sandi is a programmer, teacher, author and consultant. Id like to use martin fowlers definition from his refactoring book. If you want full spoilers, i wholeheartedly recommend sandi metz and katrina owens latest book, 99 bottles of oop. This is an exceptional ruby book, in which metz offers a practical look at writing. Sandi metz gave this talk at multiple conferences this year and it gained a lot of traction and for a reason its awesome. Sandi, along with katrina owen, is working on a book about oo design based on the 99 bottles of beer song. Whether you are a novice or an experienced ruby hacker, this book will help you become a more confident and joyful programmer.

Three days with sandi metz on practical objectoriented design. First, refactoring leaves a bad taste in many a project managers mouth and its our own fault. Sandi metz demonstrates how to build new applications that can survive success and repair existing applications that have become impossible to change. Review of objectoriented design book 99 bottles of oop. If that coding problem is good enough for them, then its good enough for me. Practical objectoriented design, second edition, immerses you in an oo mindset and teaches you powerful, realworld, objectoriented design techniques with simple and practical examples. It could also be called refactoring 1on1 for dummies. Some of the code is not idiomatic ruby, or is in a dialect of ruby that is obsolete in 2018.

Also, the code accessing those methods need not change. However, the ruby translation leaves a great deal to be desired. Code by refactoring, a workshop by deep roots therapeutic refactoring by katrina owen refactoring from good to great by ben orenstein. It was one of the best things that happened to me this year. As every programmer knows, these conversations arent for everyone. Practical object oriented design in ruby by sandi metz. Last month, i attended sandi metzs threeday practical objectoriented design course in durham, nc. This book contains an extended refactoring, and it details the rationale behind every change. Chapter 9 designing costeffective tests writing changeable code is an art whose practice relies on three different skills. Notes from sandi metzs get a wiff of this tech talk at railsconf 2016. While the book is currently in beta, missing the last two chapters, its current incarnation is excellent.

In many places of the book, sandi gently laid them out, dissected them, and. Sandis writing is eminently practical, giving the reader an oo toolbox to work. Practical objectoriented design poodr products sandi metz. Sandi metz has distilled a lifetime of conversations and presentations about. Ease and safety of refactoring concerns are a great first refactoring step because using concerns involves simply moving the methods and tests into separate files.

How is it, then, that many times they become millstones around our necks, gradually morphing into fragile, breakable things that raise the. The term refactoring was popularized by the book of the same name. A code smell is bad code in any of the various forms it can manifest itself. Poodr is a practical, readable introduction to how.

We hold scrum meetings and pair programming sessions every day with participants. Following along with realworld refactoring sessions, youll learn how to apply these lessons to legacy code. Rule of three three strikes and you refactor is a code refactoring rule of thumb to decide when similar pieces of code should be refactored to avoid duplication. Refactoring video refactoring from good to great by ben orenstein design patterns book design patterns in ruby by russ olsen refactoring by. Poorly designed code is naturally selection from practical objectoriented design.

Communitysourced refactoring advice currently in prelaunch. The thing about sandi metz is she has that wonderful mix of good communication and years of experience. Each technique is illustrated with extended examples in the easytounderstand ruby programming language, all downloadable from the companion website. Katrina is a go and ruby programmer, creator of exercism facts. Shes the author of the recently published practical objectoriented design in ruby and as all who read the book know an avid cyclist. Written by sandi metz, it explains objectoriented design ood using realistic, understandable examples. Praise for the first edition of practical objectoriented design in. Im the creator of exercism, an open source project that helps people improve their programming skills. Not only is the book 100% onpoint, sandi has an easy writing style with lots of great analogies that drive every point home. I discuss sandi metzs definition from her book practical object oriented design in. Sandi is a programmer, teacher, author and consultant. We are also a community for learning and personal development with members from across the world with various levels of competence and experience in software development. Exercism offers it as one of their problems as well, so we already have a. I have always been a fan of sandi metz, and have finally got around to her book 99 bottles of oop.

I teach an extremely practical objectoriented design pood course. Last week i introduced sandi metzs true heuristic and promised that this week wed see in in action. Doing proper refactoring, not random rehacktoring locating concepts buried in code. It teaches a practical technique for getting things done that leads, naturally and inevitably, to beautiful code. Its got a laid back style that makes it feel like you and sandi are pairing on the code under examination. She does have a chapter exactly addressing the question. A few techniques that helped me become a better developer, faster.

Sandi metz in her book practical objectoriented design in ruby, id never read it before, but i started reading it a couple weeks. Sandi has spoken about solid, objectoriented design, and refactoring at international ruby conferences since 2009 and has written two books practical objectoriented design and 99 bottles of oop. Sandi metz and katrina owen reflect upon the process of writing a book together, the secrets of building good software, and the logistics of the selfpublishing business download an mp3. This book is a great demonstration of the power of that combination. I came across a post by sandi metz a few days on a different topic in. Advice and discussion about code design and refactoring, crowdsourced from a community of experts in your field. Nadia and saron chat with sandi metz and katrina owen about how they wrote the book, what it was like to work together, and how readers can get the most out of the book. The refactoring introduces an additional message send but at this point in. Refactoring was a classic book and one of the most important for an objectoriented programmer to have in their library. Sandi metz is a programmer, teacher, author, and sometime consultant.

Sandis talk centered around the wellknown construct of code smells and how to categorize and refactor them. Identifying issues with your code and refactoring is the process of eliminating code smells. Birmingham on rails 2020 birmingham, al january 31, 2020. It is a handson workbook rather than a list of theoretical ideas. Last week i introduced sandi metz s true heuristic and promised that this week wed see in in action. The name derives from the small changes an individual bird makes in a flock that is then reflected by all the other birds so everyone ends up going in the right direction. It explains how to use the principles of objectoriented design to guide, not just the final arrangement of code, but each decision about what line of code to write next. Rails refactoring techniques concerns best practice on ror. She has thirty years of experience working on large objectoriented applications. You will see the similar styles, intentions of conveying thorough, but concise knowledge of practices, and also find it very useful.

We draw on some wisdom from sandi metz and martin fowler and remind ourselves and our listeners why good habits are more important than gifted writing. Exercism and 99 bottles of oop with katrina owen at oscon. She has spoken about objectoriented design and refactoring at international ruby conferences since 2009. Sandi metzs design patterns in ruby book is extremely well written, and rated extremely highly. Welldesigned code is easy to change, refactoring is how you change from one design to the next, and tests free you to refactor with impunity. A key takeaway so far from this has been the flocking rules for refactoring. It weighs in at nearly 70,000 words longer than most novels, about average for a mystery, and.

Sandi metz this book represents the distillation of innumerable discussions about objectoriented programming and design. Rails conf 20 the magic tricks of testing by sandi metz. Sandi metzs prior book practical object oriented design in ruby poodr sets the bar very high, so i had higher expectations for this one, but it is still absolutely worth reading. But i want to say them to you and see what you guys think about them. The book is coauthorized by katrina owen, and was years in the painful and painstaking making.