| Category | Mistake | Quick Fix | | :--- | :--- | :--- | | | Shadow variable ( := inside block) | Use = or rename | | Slices | Append to wrong slice | Capture returned slice | | Maps | Map memory never shrinks | Recreate map after deletion | | Error | Ignoring defer errors | defer closeFile(f) -> check return | | Concurrency | Data race on channels | Use sync/atomic or mutex | | Testing | Testing only the happy path | Table-driven tests + t.Cleanup |
// Good practice func foo() error // code if err != nil log.Println(err) 100 Go Mistakes And How To Avoid Them Pdf Download
Copying a struct containing a sync.Mutex creates a copy of the mutex, breaking the lock. | Category | Mistake | Quick Fix |
Avoiding common loops and range-variable traps. Key topics include:
The book is organized into 100 short sections, each detailing a specific "gotcha" and providing a practical fix. Key topics include: