Object Refactoring Extract Class. Each interface is only implemented by one class. [F 82, K 44] Speculative Generality: This odor exists when you have generic or abstract code that isn’t actually needed today. Speculative Generality (Cont’d) 25. Tìm kiếm cho: Every class implements an Interface. Speculative Generality A classic [code] smell is a method that seems more interested in a class other than the one it is in. creates the smell Speculative Generality in 68% of the cases. CCS CONCEPTS • Software and its engineering → Software evolution; KEYWORDS Refactoring, Code Smells, Structural Quality Permission to make digital or hard copies of all or part of this work for personal or [27] proposed a code pattern based . A method that is not used anywhere in the code is known as a speculative generality code smell. Code smells occur when code is not written using fundamental standards. Object-oriented abusers. Writing code that is more abstract than it needs to be is often considered to be code smell called "speculative generality" (also mentioned in the post). Agile Development promotes having Just In Time Design. Code that was over-generalized in an attempt to predict future needs. Brian Foote suggested this name for a smell to which we are very sensitive. For example: Comments, Duplicate Code, Lazy Class, Data Class, Dead Code, Speculative Generality. • Accidental Changes. Bad Code Smells are similar in concept to Development-level Antipatterns. Find them and removing or replacing them is very important for the overall quality of the code. Speculative Generality. Speculative Generality You get this smell when people say "Oh, I think we will need the ability to do that someday" and thus want all sorts of hooks and special cases to handle things that aren't required. Speculative Generality. Speculative Generality • Making code more general in case it’s needed later • Unused hooks and special cases make code more difficult to understand • Refactorings Such duplicated code reveals a lack of object-orientation and a missed opportunity to rely on the elegance of polymorphism. Refactoring - code smell. Removing code smell is an important task and can be done using automated code review tools. * Don’t try to cover a case that likely has 1% chance to happen in the future. There are various types of code smells. Speculative generality. 6 What is a Code Smell Used as heuristics to indicate when code should be refactored The phrase “Code Smell” is mainly attributed to Kent Beck in the 90’s (xp fame) 6. Everyone loses in the "what if.." school of design. Speculative Generality: Write code to solve today's problems, and worry about tomorrow's problems when they actually materialize. Dead Code • Code that is no longer used in a system or related system is Dead Code. Extract variable can help resolve the Comments code smell. Feature Envy A method accesses the data of another object more than its own data. ... then it is a good candidate for Data Class code smell. - Speculative Generality Code Smell This code smell is about premature optimization, many developers fail to see this one. You (Probably) Aren't Gonna Need It. That is, make your code meet today's requirements, and don't try to anticipate which way tomorrow's requirements will go. A method that is not used anywhere in the code is known as a speculative generality code smell. Speculative Generality 31. This code smell is known as speculative generality. It's fake generality. new code smell? STUDY. 30. (Thus an XP team is more likely to evolve a framework from an application than to build a framework and use it to create an application.) This code smell happens when code is created, but it is not used (or not needed) because we think that “We might need this come day”. Dealing with a Code Smell • Pragmatic view: Analyze each one & determine whether there really is a problem • Purist view: Get rid of it. Metrics describing the introduction and evolution of anti-patterns in code present a promising opportunity for experimentation. This group contains two types of smells (dispensable classes and dispensable code), but since they violate the same principle, we will look at them together. Inline Method can help resolve Speculative Generality. Inappropriate Intimacy One class uses the internal fields and methods of another class. Code Smells are signals that your code should be refactored in order to improve extendability, readability, and supportability. new code smell? Writing code because you might need it is sometimes called "speculative programming", or "Speculative Generality".Both are not to be confused with a the CPU's "speculative execution". The result is often harder to understand and maintain. Continuing on our discussion on Code Smells and Refactoring techniques, we will discuss Dispensable in this post. Killing Speculative Generality Code Smell. Fast and Furious Restraining Order new code smell? Classes should start out clear and easy to understand if you have a design to follow. The cure is of course the better-known YAGNI principle: You Aren't Going to Need It.. NB in that essay, Fowler calls the specific code smell a "presumptive feature". They don't describe bad programming aesthetics and you can't sniff them out precisely with code metrics. Remove Parameter Remedy of Speculative Generality 28. Extract Variable. FW: bad smell code # 5 Divergent Changes; A technic to eliminate select-case structure; technic to eliminate select-case structure - 2; Bad smell in code # 10 Select-case Statment and s... FW: Bad smell in code - Speculative Generality; FW: Bad smell in code - Speculative Generality; FW: Bad smell in code-- Temporary Fields The most common focus of the envy is the data." In this article after publishing what refactoring is, I want to describe what are the known smell codes, then you can find them and fix them. Speculative Generality. This code smell can’t be sniffed at the start as it is a result of constant changes and feature additions that make that class fat or large. The solution for this particular Code Smell lies on two different approaches, depending on the need of code. new code smell? The tool uses a genetic algorithm (GA) to search for the best sequence of refactoring that removes the highest number of code smells from the source code. I found a common pattern used in their code base. Oddball Solution: There should only be one way of solving the same problem in your code. Smells such as Inappropriate Intimacy, Variable Re-assign, Clones, Middle Man or Speculative Generality require further research to confirm their contribution. Aside from obvious hygiene and social considerations, in much the same way a strong and unpleasant body smell may be the surface indicator of a deeper medical problem, a strong and unpleasant code smell may be the symptom of relevant weaknesses in the code design. The “code”, could be a feature, superclass or even and interface that is not necessary. Couplers. I’m just reviewing a project’s code. Inline Class Remedy of Speculative Generality 27. Dispensables are avoidable components whose absence would make the code much more cleaner, readable and efficient. — Refactoring, Martin Fowler and Kent Beck (page 83). In software, a code smell is not pleasant. —Martin Fowler. Speculative Generality; Speculative generality occurs when there is unused code written to support the future needs which never got implemented. That makes sense to me, as implementing an interface adds complexity and, if there is only ever one implementation, one might argue that it adds needless complexity. PLAY. Even more interesting, this interface is not exposed outside. A code smell is a surface indication that usually corresponds to a deeper problem in the system. They describe code in need of refactoring in rich language such as 'Speculative Generality', 'Inappropriate Intimacy' or 'shotgun surgery'. new code smell? Couplers All the smells in this group contribute to excessive coupling between classes or show what happens if coupling is replaced by excessive delegation. Speculative Generality [CODING SKILL] Code thối – Code smell – Anti pattern Tháng Bảy 30, 2019 Mr.Shun 0 < CODING SKILL > Note nhẹ một vài dạng code smells (code thối) để ae tránh Feature Envy: Trong class A get một vài . Hinders: comprehension, maintenance For each code smell type, a set of metrics is calculated to identify whether a section of the code is an instance of a code smell type. Collapse Hierarchy Remedy of Speculative Generality 26. Hinders: comprehension, maintenance; Just delete the code; Speculative Generality. 13. Zhang et al. Speculative generality occurs when you make a superclass, interface or code that is not needed at the time, but you think you may use it someday. ... speculative generality depends on counting the unused . It makes code harder to understand and maintain. -Speculative Generality The common thing for the Dispensable smells is that they all represent something unnecessary that should be removed from the source code. Program entity (class, method, parameter, code fragment, statement, variable) that is unused in the system. Fowler, ... of the operating system that the object is wrapping. code smell clusters. approach to d etect five code bad smells after enhancing . Bad Smell is a term that has been used for messy or dirty coding, this term says there is part of the code which needs to be clean in term of future. Some notes to be considered during planning are: * Don’t over plan your code. You get it when people say, “Oh, I think we’ll need the ability to do this kind of thing someday” and thus add all sorts of hooks and special cases to handle things that aren’t required. Expert online guidance in Test-Driven Development, User Stories, Refactoring, Code Smells, Design Patterns, Testing Legacy Code ... A False Case of a Switch Statement Smell 82 Maps Instead of Switch Statements ... 86 Speculative Generality Example 87 Speculative Generality Quiz 88 Another Refactoring Smells Quiz . XP argues that speculative generality is a smell, and that you aren't going to need it. Dead Code. • Increased Complexity. I don't think we should use phrases like interested, since code and machines do not have human qualities such as interest or envy. 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