探索有用的Go编程代码片段

提供“前10名”Go（Golang）代码片段的明确列表是具有挑战性的，因为代码片段的实用性取决于您试图解决的具体问题。然而，我可以为您提供十个常用的Go代码片段，涵盖了各种任务和概念：

1. Hello World:

package mainimport "fmt"func main() {fmt.Println("Hello, World!")
}

2. Reading Input from Console:

package mainimport ("fmt""bufio""os"
)func main() {scanner := bufio.NewScanner(os.Stdin)fmt.Print("Enter text: ")scanner.Scan()input := scanner.Text()fmt.Println("You entered:", input)
}

3. Creating a Goroutine:

package mainimport ("fmt""time"
)func printNumbers() {for i := 1; i <= 5; i++ {fmt.Println(i)time.Sleep(time.Second)}
}func main() {go printNumbers()time.Sleep(3 * time.Second)
}

4. Working with Slices:

package mainimport "fmt"func main() {numbers := []int{1, 2, 3, 4, 5}fmt.Println("Slice:", numbers)fmt.Println("Length:", len(numbers))fmt.Println("First Element:", numbers[0])
}

5. Error Handling:

package mainimport ("errors""fmt"
)func divide(a, b float64) (float64, error) {if b == 0 {return 0, errors.New("division by zero")}return a / b, nil
}func main() {result, err := divide(10, 2)if err != nil {fmt.Println("Error:", err)return}fmt.Println("Result:", result)
}

6. HTTP Server:

package mainimport ("fmt""net/http"
)func handler(w http.ResponseWriter, r *http.Request) {fmt.Fprintln(w, "Hello, HTTP!")
}func main() {http.HandleFunc("/", handler)http.ListenAndServe(":8080", nil)
}

7. JSON Marshalling and Unmarshalling:

package mainimport ("fmt""encoding/json"
)type Person struct {Name  string `json:"name"`Age   int    `json:"age"`
}func main() {jsonStr := `{"name":"Alice", "age":30}`var person Personerr := json.Unmarshal([]byte(jsonStr), &person)if err != nil {fmt.Println("Error:", err)return}fmt.Println("Name:", person.Name)fmt.Println("Age:", person.Age)
}

8. Concurrency with Wait Groups:

package mainimport ("fmt""sync"
)func worker(id int, wg *sync.WaitGroup) {defer wg.Done()fmt.Printf("Worker %d started\n", id)
}func main() {var wg sync.WaitGroupfor i := 1; i <= 5; i++ {wg.Add(1)go worker(i, &wg)}wg.Wait()fmt.Println("All workers have finished.")
}

9. Reading and Writing Files:

package mainimport ("fmt""io/ioutil"
)func main() {data := []byte("Hello, File!")err := ioutil.WriteFile("example.txt", data, 0644)if err != nil {fmt.Println("Error:", err)return}content, err := ioutil.ReadFile("example.txt")if err != nil {fmt.Println("Error:", err)return}fmt.Println("File Content:", string(content))
}

10. Sorting Slices:

package mainimport ("fmt""sort"
)func main() {numbers := []int{5, 2, 9, 1, 5}sort.Ints(numbers)fmt.Println("Sorted Slice:", numbers)
}

这些代码片段涵盖了从基本的I/O操作到并发、错误处理等常见Go编程任务和概念。请随意根据您在Go项目中的需要进行调整和使用。