How to resolve sonar duplicated blocks

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How to Resolve Sonar Duplicated Blocks

Sonar provides a duplication detection feature that identifies duplicated code blocks within your codebase. Duplicated blocks can be problematic as they indicate code redundancy and maintenance issues. Resolving duplicated blocks is essential for improving code quality and maintaining a clean codebase.

Identifying Duplicated Blocks in Sonar

Before resolving duplicated blocks, it’s important to identify them using Sonar. Sonar analyzes your code and generates reports highlighting the duplicated code blocks. You can view these reports in the Sonar dashboard or during the code analysis process.

Resolving Duplicated Blocks

Once you have identified duplicated blocks in Sonar, you can follow these steps to resolve them:

  1. Analyze the Duplicated Code: Carefully analyze the duplicated code blocks to understand their purpose and functionality.
  2. Create a Code Block Function: Extract the duplicated code into a separate function or method.
  3. Call the Code Block Function: Replace the duplicated code blocks with calls to the newly created function or method.
  4. Refactor the Code Block Function: If necessary, refactor the code block function to ensure it handles all variations and requirements from the duplicated blocks.
  5. Test the Changes: Test the changes thoroughly to ensure that the functionality remains intact after the refactoring process.
  6. Review and Maintain: Review the changes and commit them to the code repository. Additionally, ensure that further duplication is avoided in the future by conducting regular code reviews and adhering to best practices.

Example:

Let’s consider an example to illustrate the resolution of duplicated blocks:


function calculateSum(a, b) {
  // duplicate block 1
  // ...
  // end of duplicate block 1

  // remaining code

  // duplicate block 2
  // ...
  // end of duplicate block 2

  // remaining code
}

// Resolution:

function calculateSum(a, b) {
  // extract duplicated code into a separate function
  const duplicateBlock = () => {
    // duplicated block code
  }

  // call the code block function
  duplicateBlock();

  // remaining code

  // call the code block function again
  duplicateBlock();

  // remaining code
}

In the given example, two duplicate blocks of code have been identified within the function calculateSum. By extracting the duplicated code into a separate function duplicateBlock and calling it whenever necessary, the duplication is resolved.

Remember to adapt the solution to match the specific duplicated blocks in your codebase. Keep in mind that the example provided is simplified for demonstration purposes.

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