Describe a real-world scenario where error wrapping would be beneficial, and explain how you would implement it in Go.

  • A database query that fails due to a network issue.
  • A routine data validation check that succeeds.
  • A UI rendering error in a web application.
  • An arithmetic operation that returns a valid result.
Error wrapping in Go is beneficial when propagating errors through layers of an application. In the scenario of a database query failing due to a network issue, you can wrap the original error with additional context using the errors.Wrap function from the "github.com/pkg/errors" package. This context helps identify the cause of the error and aids in debugging. You can unwrap the error using errors.Cause to access the original error for handling or logging. Error wrapping is a powerful technique for enriching error information without losing the original context.
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