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How to expose the number of HTTP requests or responses using expvar in Go?
How to implement and expose a timer with expvar for performance monitoring in Go?
How to create and expose a counter variable with expvar in Go?
How to expose memory usage statistics (heap, stack, etc.) as expvar in Go?
How to expose the number of Goroutines as an expvar in Go?
How to create and expose custom runtime variables using expvar in Go?
How to import and use the expvar package in Go?
How to write unit tests to verify error handling behavior in Go code?
How to return errors as part of a function's public API in Go?
How to implement structured error reporting and error codes in Go?
How to handle errors in a web application's request/response cycle in Go?
How to propagate and handle context-aware errors in Go?
How to implement error handling for database operations in Go?
How to handle and log errors when working with file I/O in Go?
How to implement error handling and recovery in HTTP middleware in Go?
How to wrap and unwrap errors to access underlying error information in Go?
How to create and use error constants in Go to define common error types?
How to gracefully exit a program and handle errors during shutdown in Go?
How to handle errors in concurrent Goroutines in Go?
How to use error handling with defer statements in Go?
How to handle and log errors with the log package in Go?
How to handle timeout errors in network operations in Go?
How to return errors as values and not just pointers in Go?
How to use the fmt.Errorf() function to format error messages in Go?
How to implement retry mechanisms for error recovery in Go?
How to chain multiple errors together to create a trace of errors in Go?
How to annotate errors with additional information in Go?
How to create custom error types that implement the error interface in Go?
How to handle panics and recover from them in Go using recover()?
How to define and use sentinel errors for specific error conditions in Go?
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