Questions tagged [code-smell]

Determining what is and is not a "code smell" is subjective, and varies by language, developer and development methodology. Before you ask if some technique is a "code smell," ask yourself what the consequences to your specific project would be, if you used the technique. Simply asking whether something is a "code smell" or not is too subjective.

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4answers
169 views

Feature Envy vs. Single Responsibility Principle: Data class and a validator for it

Let's say I have a class that's a bit more than a pure Data object, i.e. it holds some data and some basic queries about that data. (In this case, it's a class representing a timetable) Now, I want ...
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1answer
49 views

Should a Mover and Tracker be separate classes to maintain SRP?

I'm doing some Java code practice to better understand the Single Responsibility Principle. Currently, I'm working with a network of data structures, where each structure implements an interface ...
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0answers
97 views

Code quality balancing with need to perform scientific analysis on your own software

We have a project that is meant to do signal processing. If all we had to do with the software was that one job, we would have a pretty clean architecture. Unfortunately, we've run into an issue most ...
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2answers
60 views

How to set object parameters

I am rewriting a lexer class that has several "parameters" like whitespaceSplit. So it goes this way: lexer = new Lexer(); lexer.whitespaceSplit = true; lexer.otherParameter = ...; lexer.parse(file);...
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8answers
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Is there a better way to use C# dictionaries than TryGetValue?

I find myself often looking up questions online, and many solutions include dictionaries. However, whenever I try to implement them, I get this horrible reek in my code. For example every time I want ...
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201 views

Is using a non-compile-time-constant value as a default parameter a code smell? [duplicate]

I'm trying to use App.config and Configuration Manager for the first time. I wanted to use some values in App.config as default parameters for some methods, but this results in an error (not a compile ...
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1answer
112 views

Is a “concrete function” over “generic function” a good implementation?

I want to know others opinion about this approach that I use in a lot of projects, for example, I can show the last time that I use it: public class DataStorageService { private enum Keys { ...
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1answer
151 views

use always get and set methods is a bad practique, is call directly an attribute class a bad practique in OOP?

I have a doubt about if there are some recommendations for call directly an attribute in a class I think that in OOP you always should call an attribute by the get method. For example: On set ...
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5answers
252 views

How can I efficiently write a complex if or switch condition that depends on a combination of two (or more) variables? [duplicate]

In my current case, I've got two variables. Let's call them action and status for ease of use. They can have any value between 1 and 9. Depending on business logic, I've to either call subActionA() or ...
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4answers
1k views

is this way of calling a function a bad practice?

I have the following code: public void moveCameraTo(Location location){ moveCameraTo(location.getLatitude(), location.getLongitude()); } public void moveCameraTo(double latitude, double ...
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1answer
341 views

Two reversed dictionaries or one dictionary with key and value lookup?

I have situation where in the Repository class I have a dictionary: Dictionary<TableName, Dictionary<EntityColumnName, SourceColumnName> map1 = new Dictionary<TableName, Dictionary<...
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4answers
119 views

Date comparison with the last second of a day

Would you consider WHERE SomeDate <= '2018-01-01 23:59:59' instead of WHERE SomeDate < '2018-01-02' When the intention is that SomeDate goes no further then 2018-01-01 a code smell and if ...
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4answers
558 views

Is using the Pair class a sign of primitive obsession code smell?

Let's say I use a Pair in this way: Pair<Long, Date> signup = getSignup(); System.out.println("User with ID " + signup.getLeft() + " signed up on " + signup.getRight()); Is it a form of ...
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2answers
395 views

Class that returns multiple unrelated values, are there better way to accomplish this?

I have a "tracker" class. This class tracks objects from a given input image. But in addition to this, there is another parameter that corresponds to a value used in generating the image. The ...
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1answer
280 views

How do I use polymorphism instead of instanceof?

I'm trying to make an abstract board game. In the game, a player can choose to make multiple actions within one turn such as placing, moving, or rotating a piece. I'm not sure if whether or not my ...
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1answer
66 views

My action creators and reducers all mostly look the same - is this a code smell?

Most of my redux actions are 'fetch some data from the database, here's the authentication token', and they for the most part look the same, like this: action creator export const fetchDashboard = ...
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1answer
155 views

Why is using an internal attribute to filter objects considered OK, but when I use a map to filter based on attributes, it's considered a code smell?

A long time ago I asked about using an enum to essentially use as a poor version of instanceof to make decisions about an object. As stated in this answer: When your weapon types enum just mirrors ...
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1answer
127 views

Have an object communicate with another object

I asked similar question earlier this morning, and for whatever reason, I'm not getting a complete answer to my question. I'll ask it a different way. I was attempting to understand Eric Lippert's ...
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2answers
109 views

Using a Collection with Attributes to Check and Make Decisions

I was reading on this SESE page about using a variable to indicate the object type, more specifically, an enum. The accepted answer states: When your weapon types enum just mirrors the class ...
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2answers
249 views

Formatting a string by converting to a number then back to a string

I'm not sure whether this qualifies as code smell, or if there may be some better way of performing the same task, but, basically, I want to format a 10 digit string, using C#, and have the following ...
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5answers
354 views

Using a variable to indicate object type

The use of instanceof or getClass() is largely considered code smell. Is using a variable to indicate the type of object you're using also considered code smell? Suppose if I had an enum called ...
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2answers
138 views

Building dynamic code that can still handle many one-offs?

So we're having a rather heated debate at work as to what would be the best practice going forward while refactoring our reporting system. Most of us have some strong opinions one way or the other, ...
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2answers
5k views

Should a trait refer to parent methods?

Is it a code smell if the methods in my trait refer to parent::methods or to methods that are assumed to be in the utilising class? A random (senseless) example trait foo { public function bar() ...
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1answer
3k views

How to improve a pattern 'enum class with methods'

Over many years, I always find myself reconsidering this design, so I wanted to get some feedback on my solution to it. Problem: I need a limited amount of objects = instances from a class, and I ...
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4answers
567 views

Use of static methods to implement logic within a class

I've recently caught an odd behaviour in my own coding: At some point in the last year I began creating protected static methods to implement the logic of my public methods, ensuring that the ...
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1answer
113 views

Is a Presentation potentially a god object?

I'm working on a project with a MVP architecture. My program revolve around forms that give rights to people. There are X differents forms depending on profiles ( so there are X differents profiles) I ...
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4answers
405 views

code smell: passing through variables [closed]

Consider this simple example: def a(val_x, val_y): return 5 + b(val_x, val_y) def b(val_x, val_y): return 1 + c(val_x, val_y) def c(val_x, val_y): return val_x * val_y Passing the ...
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2answers
507 views

Is using spacing effectively equivalent to the long method code smell?

There's a common code smell involving long methods with the most common answer being that methods should be really small, less than 50 lines per say (or 20). I understand why this is because it ...
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2answers
695 views

MVVM. Is it a code smell when view model has properties with names show/hide/display that semantically belong to view?

I've lately been involved with WPF and looked into MVVM. I understand that view model shouldn't be aware of view. However, sometimes I come across situation where my initial instinct is to write ...
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1answer
2k views

How do I refactor a Data Class to not be one?

We recently upgrade to PMD 6.0.0 and are getting several classes flagged as "Data Classes"? It argues that it breaks encapsulation and makes for brittle design (I understand that this site has a ...
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3answers
289 views

Is there an elegant way to write code with differing paths having a common middle segment?

I started out with the following, simple routine: void originalCode(){ boolean status = getStatus(); function2(status); if(status){ return; } function3(); } But ...
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1answer
654 views

Hash Table with iterators as the keys, is this poor design and can I do this better?

I'm developing a program where twice I've found the solution to a problem was to use hash tables with iterators as keys and some other arbitrary type as the value. I found my self using this pattern ...
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4answers
1k views

Can factory pattern avoid code smell?

With two existing implementations, UFOEnemyShip & RocketEnemyShip, To introduce every new implementation implementing EnemyShip interface, shown below, changes are needed in factory class ...
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1answer
197 views

Police selection without hard coding an if statement

I'm trying to model the security of my project using DDD but I ended up in a dead end. I have the User, UserA, and UserB classes that were modeled as follows. What changes in practice is that UserA ...
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1answer
1k views

Clear examples for code smells [closed]

does anybody know how the code smells "rigidity", "fragility", "immobility" and "viscosity" can be explained in short code examples? I've found a lot of text but never a source code example. Thanks ...
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2answers
218 views

Is implementations not being interchangeable and having to cast often a code smell?

I'm building a small game similar to chess. I'd like to be able to reuse the structure for another version of checkers too. I'm modeling the games with interfaces (showing only relevant ones): ...
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1answer
3k views

Definition of brittle unit tests

I've seen the terms brittle and fragile used to describe poorly written unit tests. But I haven't been able to find a clear definition for what brittle or fragile actually mean in this context. Is it ...
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4answers
5k views

Are empty interfaces (but not marker interfaces) a bad programming practice?

I'm designing an architecture in which I have: public interface IObjectReader{ public Object read(); } public class ConcreteObjectReader implements IObjectReader{ @Override public ...
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4answers
340 views

Sugar Classes as code smell

Over the years I've been switching back and forward on the idea of creating Sugar Classes. Sooner or later I find myself repeating the same operation over an existing type. Like string manipulation, ...
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4answers
961 views

Reworking a function returning an integer code that represents many different statuses

I've inherited some awful code that I've included a short sample of below. Is there a name for this particular anti-pattern? What are some recommendations for refactoring this? // 0=Need to log in / ...
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2answers
2k views

What is the difference between Code Smells and Anti Patterns?

I am trying to understand the difference between these two terms. In some contexts that these two terms have been used interchangeably. What is the exact difference between these two terms ?
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3answers
2k views

When is it okay to use Parallel Arrays?

I've been running into code (new code) that uses what I call 'Parallel Arrays' or Lists. Meaning there are 2 arrays that contain related data and are linked by their position (index) in the array. I ...
5
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4answers
5k views

Multiple properties/methods giving the same result

I'm trying to ascertain whether the use of multiple references to the same property is code smell / an anti-pattern, based on the needs of the organisation. As an example, consider: abstract class ...
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1answer
117 views

Refactoring code dependent on external class

I have a class similar to ServletFilter which has multiple validation on the input request class TokenHandler implements SomeHandler{ Response handle(Request request){ if(paramXMissing(request))...
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3answers
1k views

DependencyInjection - Constructor over-injection smell vs service locator - where is the proper approach?

I am trying to improve my MVC projects and I read a few articles about DI, IoC containers, Constructor Injection and Service locators. I wanted to go with Ninject to help with the dependencies, but ...
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2answers
627 views

Does this code have only one level of abstraction?

I'm trying to apply some good practices from Clean Code in my code, but I'm stuck trying to figure out if my code has a [G34] code smell, which tells that functions should descend only one level of ...
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5answers
2k views

Should constructors ever be used only for side-effects?

Summary: Why is it wrong to design a constructor only for its side effects, and then to use the constructor without ever assigning its return value to a variable? I'm working on a project that ...
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3answers
429 views

Refactoring Atrocious Java Code [duplicate]

So I recently started a new job for a small software company. They've got some old technology which I was aware of during the interview process. However, I've been digging into their code-base, and I'...
3
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0answers
243 views

Does using returnTrue() or returnFalse() functions a code-smell?

I was trying to understand how jQuery's cross-browser events work, when I noticed these two functions in the source code: function returnTrue() { return true; } function returnFalse() { ...
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3answers
6k views

Mocking introduces handling in production code

Assuming an IReader interface, an implementation of the IReader interface ReaderImplementation, and a class ReaderConsumer that consumes and processes data from the reader. public interface IReader { ...