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What is the best way to ensure software maintainability?

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Software maintainability is the ability of a software system to adapt to changing requirements, fix errors, and improve performance over time. It is a key factor for the long-term success and quality of any software project. However, ensuring software maintainability is not a trivial task. It requires careful planning, design, coding, testing, and documentation. In this article, you will learn some of the best practices and principles that can help you achieve software maintainability in your system development.

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Mladen Luksic
Christian Dangl

dasistweb.de | live-score-app.com | Shopware and all kinds of fancy IT things

1 Use appropriate design patterns

Design patterns are reusable solutions to common problems in software design. They provide a common language and structure for developers to communicate and collaborate. They also help to achieve software maintainability by promoting modularity, cohesion, coupling, abstraction, and encapsulation. By using appropriate design patterns, you can avoid reinventing the wheel, reduce complexity, and increase readability and reusability of your code.

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Mladen Luksic
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1. Modular Design 2. Code Documentation: Comprehensive, explaining complex portions of the code, readable 3. Coding Standards and Consistency: Across the entire organization 4. Version Control: One version control system across the entire organization, update timely 5. Automated Testing: Robust testing strategy, include unit, integration, and end-to-end tests 6. Continuous Integration and Continuous Deployment 7. Regular Refactoring 8. Dependency Management: Centrally managed third-party components, libraries, etc. 9. Robust Error Handling: Meaningful error messages 10. Design for Scalability and Performance

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2 Follow coding standards and conventions

Coding standards and conventions are rules and guidelines that define how to write and format your code. They help to ensure consistency, clarity, and quality of your code. They also make it easier for other developers to understand, modify, and maintain your code. By following coding standards and conventions, you can avoid common errors, bugs, and security issues, and improve the performance and reliability of your code.

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Christian Dangl

dasistweb.de | live-score-app.com | Shopware and all kinds of fancy IT things
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We have a company wide code style. The problem is, no person on this planet really cares...so what you need is an automatic pipeline to ensure standards are used. Because it's indeed necessary to have a code that looks the same. Go with Code Style fixers, analyzers and more. Always add them to pipelines that are also used on pull requests, and also make sure to provide convention tests to be easily run locally in dev environments. The easier it is for developers, the more they will use it.

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3 Write clean and simple code

Clean and simple code is code that is easy to read, understand, and modify. It is code that follows the principles of simplicity, readability, and elegance. It is code that avoids unnecessary complexity, duplication, and ambiguity. It is code that expresses the intent and logic clearly and concisely. By writing clean and simple code, you can improve the maintainability of your code by reducing the cognitive load, technical debt, and maintenance cost.

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Christian Dangl

dasistweb.de | live-score-app.com | Shopware and all kinds of fancy IT things
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From my experience, I like to combine 3 approaches for better maintainability: Immutability, Fail-Fast and improved Exception Chaining + Logging (meaning, only on the entrypoint level as good as possible to avoid hidden and deep exception handlings). If we face the reality that no software comes without bugs (because we are all human beings) we should aim for not hiding errors but showing them (no stack trace of course), only then we can easily fix them over time. This means that we end up with less try/catches and unnecessary checks, which leads to less code and easier to read. In other words: just code as if it would work! :)

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4 Write unit tests and integration tests

Unit tests and integration tests are types of automated tests that verify the functionality and behavior of your code. Unit tests check the correctness of individual units or components of your code, such as classes, methods, or functions. Integration tests check the correctness of the interactions and dependencies between different units or components of your code, such as modules, subsystems, or services. By writing unit tests and integration tests, you can ensure the maintainability of your code by detecting and preventing errors, bugs, and regressions, and by facilitating refactoring and debugging.

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Christian Dangl

dasistweb.de | live-score-app.com | Shopware and all kinds of fancy IT things
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Yep, start directly from the beginning with a pipeline that is as strict as possible (tests, static analyzers, ...). But keep in mind, if you do too many (unnecessary) tests, you also need to maintain these while the software grows. So don't get me wrong, I'm a huge fan, but when writing the initial test concept (you better have one) make sure to talk about what should be done - so what minimum code coverage, only happy paths, lots of edge cases, or only a few? That helps the team to keep the same quality level and expectation.

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5 Use version control and configuration management

Version control and configuration management are tools and processes that help you manage the changes and variations of your code. Version control allows you to track, record, and revert the history and evolution of your code. Configuration management allows you to control, automate, and coordinate the deployment and execution of your code. By using version control and configuration management, you can ensure the maintainability of your code by enabling collaboration, traceability, reproducibility, and scalability.

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6 Document your code and system

Documentation is the process of creating and maintaining written or visual information that describes your code and system. Documentation can include comments, annotations, diagrams, manuals, guides, specifications, and policies. Documentation helps to communicate the purpose, functionality, and design of your code and system to yourself and others. By documenting your code and system, you can ensure the maintainability of your code by improving the understanding, usability, and quality of your code and system.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What is the best way to ensure software maintainability?

1

2

3

4

5

6

7

1 Use appropriate design patterns

2 Follow coding standards and conventions

3 Write clean and simple code

4 Write unit tests and integration tests

5 Use version control and configuration management

6 Document your code and system

7 Here’s what else to consider

System Development

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What is the best way to ensure software maintainability?

1

2

3

4

5

6

7

1 Use appropriate design patterns

2 Follow coding standards and conventions

3 Write clean and simple code

4 Write unit tests and integration tests

5 Use version control and configuration management

6 Document your code and system

7 Here’s what else to consider

System Development

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