How To Remove Code Smell, Code smells are indicators that somet

How To Remove Code Smell, Code smells are indicators that something might be wrong in your codebase. … What is a code smell? A code smell is a characteristic of code that causes experienced programmers to feel that the code isn’t clean. When you or someone else revisits it months later, you won’t have to waste time figuring out what’s going on. They are not bugs or errors but are tangible and observable … AI-powered code review tools are revolutionizing how teams maintain code quality. However, even experienced developers can inadvertently … This is the code repository for Writing Clean Code - 20 Common Code Smells and How to Avoid Them, published by Packt. &quot;Code smell&quot; refers to indicators in code that suggest potential problems. What Makes Your Code Smell and How Can You Remove Smells Confusing Names: Looking at variable names like int errupting or case closed are funny but not what you will use in your code. By examining examples in C#, the lesson teaches how to identify and refactor common … Code smell was a term coined by Martin Fowler in his Book about code refactoring. We will also try to understand the relationship between different code smells wherever possible. "Code Smells and Refactoring: A Practical Guide" by Steve Berczuk: This book is a practical guide to identifying … I have installed Sonar Lint Extension for Visual Studio 2019 and according to the project i am working it is not required to fix the Code Smell Violations. In this article, we'll take a hands-on approach to code … Addressing code smells typically involves refactoring, which is the process of restructuring the code to improve its quality, maintainability, and extensibility. Program development becomes much more … 🚫 5 Parameter-Related Code Smells and How to Refactor Them In software development, the way you design and pass parameters can significantly impact code … Code reviews, automated code analysis tools, and adherence to coding best practices can help in identifying and eliminating code smells. They are not bugs, but they can lead to issues if left … Code smells are things in a codebase that readily stick out and imply something may be off with how it has been designed. how to make orange slice decorations (or garland): there’s something comforting about an old fashioned Christmas - the kind that smells like citrus & pine, where decorations are made … In computer programming, code smell is any symptom in the source code of a program that possibly indicates a deeper problem. Identificar e corrigir esses … So here in this article, we will explore creating a NULL object for solving a problem by identifying the NULL check code smell. It provides best practices for C# development, including using … These smells mean that if you need to change something in one place in your code, you have to make many changes in other places too. As you’re … Code smell is a term used in computer programming to describe a symptom in the code that may indicate a deeper problem. You can ask them to delete unreachable code and align logic with tests. It’s not a bug — it won’t crash your app — but it could cause problems in the future. Use static analysis tools or IDEs such as Visual Studio as it suggests to remove the unused code. According to Martin Fowler, "a code smell is a surface A code smell is a surface indication that usually corresponds to a deeper problem in the system. ai, SonarQube, ESLint, and more help teams improve code quality and reduce technical debt. … A code smell is a symptom in the source code that indicates potential underlying issues or weaknesses in design, even if the program functions correctly. Code smell, also known as bad smell refers to any symptom in the source code of a program that possibly indicates a deeper problem. But ignoring code smells today leads to complicated code problems … 8. Unused Code: - Code Smell: Code that is never executed or variables that are declared but not used. Developers and testers should know what causes code smells -- not to mention how to eliminate code smells with refactoring. Improve your code quality with refactoring tips. 🧼 Remove unused method signatures when overloading. Learn how code smells indicate deeper issues in your source code and why identifying them is key to writing clean, maintainable code. Once you spot any of the described symptoms, you will now know the name of the smell and can research about … Use this cheat sheet to check your code every time you need to refactor it. It’s easy to overlook code smells, as they’re generally only identified upon reflection or by more … We argue that code smells and refactoring could be considered as the two faces of a same coin. Custo a Longo Prazo Ignorar code smells pode ser uma escolha custosa. They work well when you already have coverage. To ignore Info Code Smells, but not other Code Smells, you would need to be able to add Blocker Code Smells, Critical Code Smells &etc to your Quality Gate. O que é code smell? Entenda os sinais de código problemático que geram débito técnico e aprenda a identificá-los e refatorá-los para um código limpo. Contribute to Luzkan/smells development by creating an account on GitHub. They do not … The JavaScript Fix-It Guide: Common Code Smells and How to Resolve Them Ensuring code quality is not just an option but a necessity for the successful delivery … We show that code smells and refactoring have a strong relationship with quality attributes, i. Once you spot any of the described symptoms, you will now know the name of the smell and can research about … We have seen many developers and reviewers ignore code smells. This guide explores refactoring techniques to improve code quality and reduce technica Entender o que é Code Smell é importante para manter o código limpo e livre de problemas. Solutions Remove the dead code completely after writing the code that replaces its functionality. However, we need to detect code smell introduced by … A collection of Bad Code Smells in a Catalog form for Developers & Researchers. The first application I published on the App Store was littered with code smells, bad practices, and anti-patterns. Clean code should be self-explanatory and readable, minimizing the need for comments. … A code smell, put loosely, is code that looks like it’s going to be trouble. tests=. Let’s see how to change the aromas. Refactoring aims to improve the … Code smells are signs of poor coding practices that hinder software quality. In this blog post, we’ll discuss SonarQube can help identify and avoid these code smells in C# projects. Duplicate Code Signs and Symptoms Two code fragments look almost identical. The term was first coined by Kent Beck while helping me with my Refactoring book. Learn practical, real-world examples to … As a Python developer, you know that code smell can be a common issue when working on large projects. #padrão #programador code smells code smells (ou cheiro de código) são características ou padrões no código fonte que indicam problemas mais profundos na … That’s your nose telling you: “This code smells. Code smells are signs of poor coding practices that hinder software quality. They hint at deeper problems in your codebase that may not break your app today, but will make it harder to maintain, scale, or … 7 Common Java Code Smells You Should Fix Immediately in Your Real-Time Project 📚 Discover 7 common Java code smells and how to fix them. The code smells bad. AI tools can remove this smell with simple instructions. … Understanding what is code smell detection and how to implement it effectively can save your project from this fate. The concept of code smells is closely tied to recognised software engineering principles because code smells indicate violations of fundamental best practices that affect code quality. In such cases, comments are like a deodorant masking the smell of fishy code that could … This article discusses code smells, which are patterns of code indicating potential problems in design or implementation. Interested to learn about Code Smells? Check our article explaining some common code smells and how we can eliminate them Now that you understand what code smell is, let's take a look at some examples in English? (Agora que você entende o que é code smell, vamos dar uma olhada em alguns exemplos em inglês?) Code smell detection is the practice of identifying these warning signs early, before they pile up into technical debt. Improve your coding skills for better project outcomes. Unused functions, variables, or imports contribute to code … Code smell is a way to describe code that hasn’t aged well and has the potential for a lot of issues. Choose names that accurately describe the purpose or content of the code entity. Adding features to a … A developer’s guide to code smells: what they mean, why they matter, and how to clean them up before they turn into tech debt. Besides, we identify how refactoring affects quality attributes, more than code smells. Identify code quality, apply heuristics, and adopt best practices to ensure clean, efficient, and maintainable code in your development process. With "smell" being an imprecise sense, the phrase lends itself to vague, subjective criticisms – "I don't like this, therefore it's a code smell". Code smells are a set of common signs which indicate that your code is not good enough and it needs refactoring to finally have a clean code. Code smells are certain indicators of problems in code and express that something is wrong. It uses language-specific analyzers and rules to scan code for mistakes, some patterns that are known to introduce security vulnerabilities, and code smells [According to Wikipedia and Robert C. Bloaters Bloaters are code, methods and classes that have increased to such gargantuan proportions that they’re hard to work with. Code Smells: Null Code Smells: Deeply Nested Code Code Smells: Iteration Spot and fix code smells for cleaner, robust code. Avoid bad coding practices and write cleaner, maintainable code as a new developer. The quick … 5. Common examples include poor exception handling, magic numbers, and inefficient string operations. g. If you think something is missing, please check out my previous post, 5 easy wins to refactor … Learn how to recognize common Kotlin code smells along with strategies to mitigate issues that are discovered. 🧹 Remove unnecessary classes and functions. Download Table | Code smells and refactoring steps from publication: On Experimenting Refactoring Tools to Remove Code Smells | When we develop a software project of a certain complexity, source Code Smell is a term coined by Kent Beck and introduced in Martin Fowler's book, Refactoring. We are using sonarlint extension for visual studio to analyze our code by connecting to our project’s rule profile. Fix: Remove unused code. Is … Code smells are indicators of potential issues in your code that may lead to maintenance challenges, reduced readability, and increased… Code smells are not bugs—but they’re warning signs. Saiba mais neste artigo. For Kotlin developers, these tools can automatically catch bugs, style issues, and even … Learn about code smells and the best practices for detecting and fixing them. My most common reflex is … Learn 8 Python code smells, why they’re bad, and how to fix them for cleaner, maintainable code. In this article, we’ll uncover common code smells, understand why they occur, and explore actionable fixes with practical examples. Usually these smells don’t crop up right away, rather they accumulate over time as the program … Hi, A solution I’m analysing in SonarCloud via Azure Pipelines is showing code smells in the test projects. Learn about code smells—indicators of deeper issues in programming. Learn 8 Python code smells, why they’re bad, and how to fix them for cleaner, maintainable code. When you fix a bug, you’re restoring correct functionality. This … Enter static code analysis, a powerful technique to evaluate your code without executing it, helping you identify bugs, code smells, and security vulnerabilities early in the development process. However, code smells are explicitly not bugs or … *title: sniffing out the stink: 5 common code smells and how to refactor like a pro* code smells are like subtle body odor on your codebase: they don't break functionality, but they hint at deeper Refactoring code to fix code smells is an integral part of the software development process. For example, we implement parallel inheritance hierarchies on purpose when we use the abstract factory design pattern. They make code harder to understand, maintain, and debug. Code Smells are patterns of code that suggest there might be a problem, that there might be a better … In this article, we'll highlight 10 of the most common code smells, and how to deodorize them. Reasons for the Problem Duplication usually occurs when multiple programmers are … Run commands Java Static Analysis: Clear Problems to remove all the violations of detected code smells Run commands Java Static Analysis: Create Report to create a report of all the code smells found in a project … Is it possible to have the Unit Test code still analysed for Code Smells but not have it count towards the test coverage metric? I have tried setting the sonar. Identifying and refactoring … Learn how to identify and fix common code smells such as long methods, large classes, duplicated code, and more using clean code techniques. Common examples include duplicate code, dead code and god objects. during code reviews) report issues not seen by SonarQube but which should be taken … Remove unused parameters. A 'smell' in the context of programming refers to certain patterns in the code that could indicate a … 650 votes, 111 comments. 🧩 What Are Code Smells? Coined … When code smell is left unaddressed, it can degrade the application's performance as well as increase the technical debt. … Commented-out code and dead code are code smells because they can mislead programmers into thinking that the code is an executable part of the program. We are using Sonarlint connected to our Sonarqube server but when operating the code analysis the “Code Smells” is not detected by Sonarlint (even if it is detected by Sonarqube server). It refers to any character in the source code of a program that possibly indicates a deeper problem. Improve maintainability, security, and performance with cleaner code. It contains all the supporting project files … I am working in Code smells in my project, but here is one class in which i don't want to change anything. Learn detection, refactoring, & best practices in software development. Learn how code smell mapping empowers safe refactoring, modernization, and … Code smells are certain characteristics or patterns in your code that indicate potential problems or areas for improvement. Just like a bad odor can indicate that something is … It covers a variety of topics, including code smells and how to address them. This lesson introduces the concept of code smells in software development, focusing on patterns that indicate potential issues within code. This guide will help refactor poorly implemented Java if statements to make your code cleaner. There are code smells that don’t always signal poor code. Elevate your coding skills. Code Smells A code smell, a term coined by Kent Beck, refers to problems within the design and structure of the underlying code in software. Bloaters A Bloater smell represents a code … In the next blog, we will explore some other code smells with examples. A not … Let’s settle one thing first — what are HTML Code smells? What are HTML Code Smells (and Why They Aren’t Gross) A “code smell” isn’t about a physical scent that emerges from your computer (thankfully, because that … Want to refactor some code but don't know where to start? Just implement a functionality and want to clean up the code? Check out the code smell cheat sheet Learn what code smells are, why they matter, and how refactoring helps reduce complexity, prevent technical debt, and keep your software maintainable. Enjoy refactoring !!! Wrapping Up Code smells and design smells are warning signs, not death sentences. But when you address a code smell—a process known as refactoring—you’re investing in the long-term … Code without smells is easier to read, understand, and modify. This involves … CLion, the popular C/C++ IDE from JetBrains, offers a powerful code inspection feature that helps improve code quality by detecting potential issues and code smells. Or: argh! Where do I start?!This is part of a series investigating code that looks suspicious ("code smells"), and exploring possible alternatives. Prevent them by writing … Recognizing and addressing code smells is crucial for maintaining healthy, scalable, and maintainable code. . This class showing in code smells, I want it should not be show in Code smells. This article will discuss the most common code smells in C# and how… Today, in this article, I will introduce some of the code smells and the way of dealing with them, but before starting you may wonder how… Hi, I have some Code Smell that I don’t want to see in Sonar. md Created 3 years ago Star Fork How to remove Lombok Code Smells/Issues or findings from SonarQube lombok-sonarqube-findings. Today this article brings to you one powerful tool to prevent some code … What is code smell? Learn to identify and fix common code smells. I've never particularly liked the term "code smell". But managing code smells should be an important factor in your software development cycle. For instance: The size of code decreases, confusing coding is properly restructured. Code Smell: Code that is never executed or variables that are declared but not used. It provides practical tips on how to identify and … Recognizing and addressing code smell early on is essential for maintaining code quality - read more in out article. A code smell is a surface indication that usually corresponds to a deeper problem in the system. Here are some reasons why overuse or misuse of comments can be considered a code smell: Code Duplication: … O Code Smell é um problema comum no desenvolvimento de software que pode comprometer a qualidade e a manutenibilidade do código. Code smells are usually not bugs — they are not technically incorrect In this article I’ll be walking through an example of how to refactor the Long Method code smell. These are the most important code smells to look out for as a programmer. - Fix: Remove unused code. Should You Use Copilot To Remove Code Smells? Are you curious about how AI tools can help improve your coding projects? In this video, we'll explore whether Code smells são indicativos de potenciais problemas no código-fonte que podem levar a dificuldades de manutenção, bugs e até mesmo a complexidade desnecessária. Discover what is a code smell, why it harms your software, and how to spot and fix it with practical refactoring tips and modern tools. Like a detective tracking clues, noticing these “smells” lets you zero in on parts of the code that need attention. 5 If I specify <SonarQubeTestProject>true</SonarQubeTestProject> it will exclude the project from not just code coverage but also code smell and duplicate detection. I'm Leonardo Montini and that's what I like to talk about, let's get in touch! It’s a constant struggle - balancing clean, maintainable code with the pressure to ship fast. This handy guide is here to help you figure out … In this guide, we'll break down the most common code smells devs run into, and more importantly, how to refactor them into something cleaner, safer, and easier to work with. This doc is summarized from Martin Flower's book … Code smells are like warning signs in your code, indicating areas that might need attention or improvement. Here's a few common ones you may fi AI Detection AI tools can remove this smell with simple instructions. PDF | On Jan 5, 2023, Olivier Le Goaer and others published ecoCode: a SonarQube Plugin to Remove Energy Smells from Android Projects | Find, read and cite all the research you need on ResearchGate This research paper explores the domain of code smells within Python programming, presenting methodologies for their mitigation through systematic refactoring … Comments are usually created with the best of intentions, when the author realizes that his or her code isn’t intuitive or obvious. To avoid dead code, programmers should regularly review and remove any code that is no longer required. À medida que o projeto cresce, a correção de problemas de code smells se torna mais cara e demorada. “Dead Code” is a common code smell that occurs when … Get hands-on with code smell cleanup and learn how to refactor common anti-patterns for better code quality and maintainability. It usually is the source of a lot of hot fixes or workarounds keeping it functional. A code smell is a characteristic or pattern in code that signals potential design or implementation issues. I tried using JDeodorant, but it is not feasible to checkout the … Code smells are signs of potential issues in software development that indicate poor design, maintainability problems, or inefficiencies. While security quietly takes a … RQ1: What are the most common code smells when using React? RQ2: How common are the identified React smells in open-source projects? RQ3: How often are the identified React … How do I remove this inheritance-related code smell? Asked 6 years, 5 months ago Modified 6 years, 5 months ago Viewed 7k times Avoiding Common Code Smells in C# with SonarQube : r/dotnet r/dotnet Current search is within r/dotnet Remove r/dotnet filter and expand search to all of Reddit Code smells are early warnings of deeper problems and how advanced analysis tools go beyond simple bug detection. Optionals were meant to counter nulls, but they don't work in every use case. Improve your coding skills with this comprehensive guide. Code Smells: Null Code Smells: Deeply Nest Subscribe Now Code smell can affect software quality and sustainability (Image credit) What does code smell mean? Code smell refers to the metaphoric lingering, unpleasant odor that can emanate from … Tool – code smell support Questions We tried to answer the followed questions: Q1: which refactoring tool results more useful in removing smells according to our experimentation? Q2: … This is part of a series investigating code that looks suspicious ("code smells"), and exploring possible alternatives. Is there a way of adding data annotation or something to ignore my method being analyzed for Code Smells? … A code smell is a sign that your code might be messy, confusing, or hard to work with. Basically, there are some ways by which the NULL code smell … Improve your software design skills by learning 20 common code anti-patterns and techniques to eliminate them! What are code smells, how to detect and prevent them in software projects? Clean code writing and refactoring techniques. In the world of software development, maintaining clean and efficient code is crucial for long-term project success. Code is like a… We discuss how to spot Kotlin code smells using both manual and automated tools and investigate how to remove five common code smells. , with understandability, maintainability, testability, complexity, … Two code fragments look almost identical. I need to retrieve the Code Smells introduced by each commit, coming from GitHub on existing projects. Code Smell: Long Method Definition: A method has too many lines of code, making it hard to understand. So is there a way … Neste artigo veremos como identificar e corrigir alguns dos principais bad smells no código fonte da aplicação através de refatorações. What is a Code Smell? Let me provide you with my personal definition and some examples to Tagged with tutorial, codenewbie, beginners, programming. … A code smell is any characteristic in code that possibly indicates a deeper problem. 🧽 Keep the structure of the code simple 😄: avoid over … Code smell points toward issues that may not be immediately damaging but could complicate modifications or even become bugs in the long run. In this article, we will delve into three more code… Our results show that 2 types of code smell co-occurrences generally tend to co-occur. São Code Smells desse tipo: Comments Duplicate Code Data Class Dead Code Lazy Class … In this module, we will introduce the repeated switch code smell and discuss its negative impact on code readability and maintainability. 2) smells were usually caused by violation of coding conventions, 3) reviewers usually provided constructive feedback, including fixing (refactoring) recommendations to help developers … See some code smell examples you’re likely to find in your codebases, understand why they matter and learn how to solve them. Looking for the best code smell detection tools? See how CodeAnt. Code smell refers to any characteristic in the source code that can indicate a deeper problem. , works on suggesting the right refactoring to remove a smell by ex-ploiting … Technical content on Open Source, Web Development, GitHub and Visual Studio Code. It is important to pay attention… In this post I will go over 5 VERY common code smells and how to fix them. In this article, I showed the 5 most common code smells, in my opinion, and how to refactor those smells and Code Smell GPT is an innovative VSCode extension designed to be your intelligent coding companion, helping you to write cleaner, more efficient, and maintainable code. 📗 The Code Smells Catalog. … In software development, writing clean, maintainable code is crucial for the long-term success of any project. /Tests parameter … Summary: Code smells signal poor code structure that may lead to bugs or maintenance issues. The code might still work, but it’s … Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your JAVA code Context: Code Smells&#8212;a concept not fully understood among programmers, crucial to the code quality, and yet unstandardized in the scientific literature. Discover through examples like redundant boolean literals, explicit exception throwing, inefficient string … Learn what code smell means with 7 common examples. ” A code smell isn’t necessarily a bug — it’s a symptom of deeper design issues. It’s not a bug or… Introduction: Code smells are indicators of potential issues in a codebase, and Sonar Cloud is a valuable tool for identifying and addressing these concerns. Learn how to identify and eliminate Python code smells with practical examples. In the world of software development, code is the driving force behind functionality, user experiences, and innovation. I would like to prevent code smells in test projects being … SmellGPT The SmellGPT is a Visual Studio Code (VSCode) extension designed to identify code smells in your codebase. The following code smells are from the Mäntylä-Lassenius taxonomy. Overuse or poor use of if statements is a code smell. What Makes Your Code Smell and How Can You Remove Smells? This article includes some of the most common code smells that you may be committing when Identify and eliminate 10 common programming code smells that harm your codebase's readability and maintainability. Code smells should be quick and easy to spot. Let's discuss the types of code smell and some … Sonar: Sniff Code Smell Like Never Before Improve The Quality of your Code Hello everybody, I hope you are having a great day. Se referem a algo desnecessário que, quando removido, resultaria em código mais legível. Code Smells A code smell is a noticeable indication that there might be something wrong with the code. By methodically analyzing codebases to detect problematic patterns, and then incrementally applying focused … Discover the common code smells in Python and learn practical ways to fix them. By understanding what code smells are, how to identify them, and how to fix them, you can improve the quality of your codebase. Improve your code quality & reduce technical debt. It doesn’t necessarily mean your code is broken — it still compiles and … matiasah / lombok-sonarqube-findings. Code refactoring has many advantages and disadvantages. Think of it as preventative care—cleaning up these smells early will save you time, … ♻️ Example projects illustrating Code Smells in order to apply Refactoring techniques - CodelyTV/refactoring-code_smells-design_patterns This article was contributed to devinterrupted by Dan Willoughby, founder of Tellspin Code smell is Tagged with programming, codereview, tutorial, motivation. Code smells are a term often used to describe certain patterns in code that Learn to identify and fix common code smells like duplicated code, long methods, and large classes. Moreover, we observed that the removal of code smells co-occurrences lead to a significant reduction in … Learn about code smells, their impact on software quality, and how to effectively identify and eliminate them. In the world of software development, maintaining clean and efficient code is crucial. They also … AI tools can remove this smell with simple instructions. e. Read this blog to understand how you can prevent them. Here are solutions to nulls and null checks, including how IntelliJ IDEA can help. This post focuses on code smells, which are common issues in code that can make it difficult to maintain and understand. A "smell" often highlights areas that may lead to maintenance … This article will help us to identify code smells known as dispensables in C# and fix them using different refactoring techniques. In this article, we’ll explore what code smells are, how they’re detected, … The Top Code Smells to Watch Out for in Your iOS Development and How to Keep Your Codebase Clean Use this cheat sheet to check your code every time you need to refactor it. Having a good “nose” for code smells is roughly comparable to the … Code Smells plugin for SonarQube The Code Smells plugin for SonarQube allows developers to manually (i. Learn these techniques. Code Smell is a typical bad code implementation, and learning these concepts immiedietly makes you a better developer! Message chain code smells are indicators of poor code quality and design. Learn how to identify and address code smells, discover the power of refactoring, and elevate your software development skills. To write high quality software, it’s good to know and recognize a few code smells. Code Smells are the traces in the code that indicates a deeper problem in the application or codebase. Extension for Visual Studio Code - LLM-powered VS Code extension that scores your code quality, detects smells, and delivers smart, fun reviews in real time. The application worked, but it was a challenge to maintain. You will learn how to recognize and refactor repeated switch statements for cleaner, more … Is there a way to configure the analysis scope for individual issue categories? I want to completely disable code smell analysis, but keep security analysis. In this article, I am going to explain the code smells with real … Welcome to the third and final part of our series on clean code and code smells. Easily convert text between different letter cases: lower case, UPPER CASE, Sentence case, Capitalized Case, aLtErNaTiNg cAsE and more online. Code smells are a sign of a deeper problem in your codebase, making it harder to maintain, debug, and extend. Definition (Code Smells) Code smells are common code anti-patterns which could and should be refactored. When you identify code smells in your code, it’s important to choose the best process for refactoring. How to Fix Security Code Smells in Android Apps In Android development, we often celebrate sleek UIs, features, and smooth performance. If you're a new programmer, avoid these and your code will be noticeably better! With respect to refactoring and code smells, we can nd in the literature many works in several directions, e. Instead, remove them and use … Code smells are surface-level indicators of deeper programming design flaws. Chapter 8 Code Smells and Refactoring If you want to learn more about any of the code smells and refactorings described in this chapter or want to know additional ways your code can smell, Martin (2009), Shvets, and Fowler … Code smell is a term used in the software development industry to describe code that is poorly written or structured. Learn how to identify, address, and prevent them with actionable insights. md Manual code reviews, conducted by peers or experienced developers, can examine codebases line by line, looking for these common code smell indicators. zjmi lxxpsjx kgdybri iymwip rlrgh xselh ylmbu yfcnk pcb vzom