Adapted from original code by julia silge, data scientist at stack overflow. Its easy to learn, has just a few easytounderstand tables, and has realworld data distributions for numbers, dates, and strings. Today refactoring requires considerable design knowhow, but once tools become available, all programmers should be able to improve their code using refactoring techniques. Over the last decades, ive succumbed to an unfortunate addiction that of writing books. Code refactoring is the process of restructuring existing computer codechanging the factoringwithout changing its external behavior. Refactoring is an effective way to quickly uncover problematic code and fix it. In this book, martin fowler shows you where opportunities for refactoring typically can be found, and how to go about reworking a bad design. Most refactoring techniques are fairly straightforward, and there is often really good tool support for these now in both the case of code smells and refactoring techniques, there are new ones being discovered all the time, so the list of names is. Existing code shows how refactoring can make objectoriented code simpler and easier to maintain. Prashanth chandrasekar is the new ceo of stack overflow and he joined ched. Stack overflow is a much loved programmer question and answer site written by two guys nobody has ever heard of before. If changes are made to that class, the scope and meaning of. Does it come from the word factor, like doing the factor again or factory, like refabricating.
If you have to deal with someone elses dirty code, try to refactor it first. English language learners stack exchange is a question and answer site for speakers of other languages learning english. Refactoring is intended to improve the design, structure, andor implementation of the software its nonfunctional attributes, while preserving the functionality of the software. Even before i started work on the refactoring book, john brant and don roberts came up with the smalltalk refactoring browser. Things such as schemas and queries related to how they handle tagging, caching of various parts of the page, how the database is configured to handle greater number of reads to. About us learn more about stack overflow the company.
Stack overflow is just part of my programming work flow at this point. Whenever i see a book on the ground or sitting unattended on a counter, visibly abandoned, i take it to where it belongs. I am looking for code samples that are good examples of how to refactor code. The existing answer did a nice job of refactoring your code, but. Improving the design of existing code shows how refactoring can make objectoriented code simpler and easier to maintain. Refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal structure. Refactoring helps you understand other peoples code. Without refactoring you accrue technical debt, forget what portions of code do and create.
Programmers often use forums, such as stackoverflow, to easily and quickly solve their issues. Refactoring may involve moving a field from one class to another, or pulling some code out of a method to turn it into its own method, or even pushing some code up or down a hierarchy. With this book he brings the benefits of refactoring into the html world. Legacy code nightmare closed ask question asked 10 years. Apart from technical help which i did receive even before i joined stack overflow this community made me understand what communication is. While these individual steps may seem elementary, the cumulative effect of such small changes can radically improve the design. So that you can revert a bad refactoring without losing what was done before. If refactoring code fixes a bug, wasnt what you did, by definition, not refactoring.
What is an antonym for refactoring with regards to. Stack overflow commenters want you to read plenty of books. Refactoring is a disciplined technique for restructuring existing code, altering its internal structure without changing its external behavior. Ive always respected him as a fine programmer and writer. Refactoring is a change to the code that has no effect on the codes behavior. He doesnt use javas reflection api or build an enterprise application. The code examples are in java, but fowler doesnt do anything in the book thats very specific to that language. The most mentioned books on stackoverflow slashdot. It seems that refactoring is just editing your code or what. If youve heard of refactoring and think youre doing it when you move code around, youre probably doing some variation of the specific refactorings discussed in this book. This is the book that im proudest of, in that its had a high impact on the world of software development.
Some of the technical challenges along the way included supporting hundreds of doma. You need to read this book to better understand the various kinds of refactoring that you can utilize to clean up your code base so that its more readable and maintainable. The question part would be how can i refactor this code for x. If you have a similarly uncontrollable urge to read books ive got that disease too then heres a. Stackoverflow list of influential programming books dorado list.
If a new movie typeprice code is created, this code also needs to be adjusted. We used 14 ass related terms to search the relevant posts in stack overflow and. Net, youll discover to apply refactoring techniques to manage and modify your code. How to download the stack overflow database brent ozar. Before entering stack overflow i was a very poor in communication skills and was very shy to speak even online. Refactoring is modifying existing code to improve its readability, reusability. Keep on mind refactoring does not add value to your customer this can be discussed, but the customer does not pay you to refactor. Stack overflow is a privately held website, the flagship site of the stack exchange network, created in 2008 by jeff atwood and joel spolsky. The heart of the book is a catalog of refactorings, organized in chapters on composing methods. Design patterns are typical solutions to commonly occurring problems in software design. The sox userscript adds a bunch of optional features to all sites in the stack exchange network. The book is well written, provides samples, examples, diagrams, steps to follow, sidenotes, commentary, and basically everything you would need to fully understand a refactoring method. These can be toggled on or off from an easy to use control panel see screenshot below.
Code refactoring is a disciplined technique for restructuring an existing body of code, altering its internal structure without changing its external behavior,1 undertaken in order to improve some of the nonfunctional attributes of the software. While the questionandanswer platform integrates with microsoft teams, stack overflow is under new leadership. I want to use my course material to write a book in the future more hot. I generally start fixing bad code by moving things around a bit without actually changing implementation code more than required so that modules and classes are at least somewhat coherent. Developing unit tests while refactoring legacy code. Code refactoring is an expression widely used in programming communities and is used to describe the work of changing or rewriting the program code without changing the code results. It is sometimes easier to fix a bug by refactoring the code its in than by tracking it down. Id recommend a tag like refactoring or refactormycode but either would work. More information about insufficient modularization can be found in the book. And here comes one of stack overflows essential flaws instead of being aimed at knowledge reuse and answers refactoring for the purpose of improving quality this site encouraging fast onsight short answers. In that sense stack overflow is like a celebrity owned restaurant, only it should be around for a while.
I use a microsoft sql server version of the public stack overflow data export for my blog posts and training classes because its way more interesting than a lot of sample data sets out there. This awesome tool makes refactoring much quicker and more pleasurable. The trouble is that it is a smalltalk tool, and not many people are using smalltalk. There are many many ways in which stack overflow has helped me. While the book doesnt provide revolutionary solutions to perform refactoring you shouldnt perform major refactoring in one step anyway, a. Talk on code smells and feels and how to change that via refactoring. For instance, pinto and kamei 6 investigated data retrieved from stack overflow to analyze the questions and answers about refactoring. Stack overflow is the largest online community of developers, boasting over 50 million unique visitors per month. Although after each book i seriously consider giving it up, i havent yet succeeded.
Its a fantastic book that refactors code throughout the book and explains how to get there. Consider this definition of refactoring from martin fowlers book, refactoring. They are blueprints that you can customize to solve a particular design problem in your code. Refactoring ienumerable ask question asked 5 years, 3 months ago. Which points out the more precise problem relying upon a enumtype in another class. Several development environments now automate many of the refactorings described in the book. Top books referenced on stack overflow dice insights. What are the details of the stack overflow development architecture. Refactoring has become a fullfledged part of the software development lexicon sadly also leading to misuse. The above 2 books will give you more ideas of how to decide where to break things up into smaller and more manageable pieces, and when to leave things alone. The site was created by top programmer and blog stars jeff atwood and joel spolsky. You will improve it not only for yourself but also for those who use it after you. Improving the design of existing code 2nd edition hardcover nov 19 2018.
Researchers then investigate those questions to better. In addition to the refactoring book referenced above, these are other good reads for. Stack exchange software engineering stack exchange sign up. Even if you have distributed functionality among different classes in a lessthanperfect way, there is still hope. These refactoring techniques show how to safely move functionality between classes, create new classes, and hide implementation details from public access.
If changes are made to that class, the scope and meaning of the data can change. Refactoring legacy code can actually fix bugs sometimes. What are the architecture details of stack overflow. Elliotte rusty harold has long had a permanent place on my bookshelf for his work on xml technologies, and a place in my libraries for his open source software for xml processing. Refactoring questions is pretty similar to refactoring code, its maintenance on a communal library of problems and their solutions. The examples are all pretty straightforward data classes that have a few responsibilities. Stack overflow reveals which programming languages are most. Improving the design of existing code object technology series 1 by fowler, martin, beck, kent, brant, john, opdyke, william, roberts, don isbn. Stack overflow extras sox is a project that stemmed from the stack overflow optional features soof project.
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