Go（Golang）的十個(gè)常見代碼片段用于各種任務(wù)

作者：Slagga 2024-01-02 22:12:15

提供“前10名”Go代碼片段的明確列表是具有挑戰(zhàn)性的，因?yàn)榇a片段的實(shí)用性取決于您試圖解決的具體問(wèn)題。然而，我可以為您提供十個(gè)常用的Go代碼片段，涵蓋了各種任務(wù)和概念。

探索有用的Go編程代碼片段

提供“前10名”Go（Golang）代碼片段的明確列表是具有挑戰(zhàn)性的，因?yàn)榇a片段的實(shí)用性取決于您試圖解決的具體問(wèn)題。然而，我可以為您提供十個(gè)常用的Go代碼片段，涵蓋了各種任務(wù)和概念：

1. Hello World:

package main

import "fmt"

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

2. Reading Input from Console:

package main

import (
    "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 main

import (
    "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 main

import "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 main

import (
    "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 main

import (
    "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 main

import (
    "fmt"
    "encoding/json"
)

type Person struct {
    Name  string `json:"name"`
    Age   int    `json:"age"`
}

func main() {
    jsonStr := `{"name":"Alice", "age":30}`
    var person Person
    err := 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 main

import (
    "fmt"
    "sync"
)

func worker(id int, wg *sync.WaitGroup) {
    defer wg.Done()
    fmt.Printf("Worker %d started\n", id)
}

func main() {
    var wg sync.WaitGroup
    for 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 main

import (
    "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 main

import (
    "fmt"
    "sort"
)

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

這些代碼片段涵蓋了從基本的I/O操作到并發(fā)、錯(cuò)誤處理等常見Go編程任務(wù)和概念。請(qǐng)隨意根據(jù)您在Go項(xiàng)目中的需要進(jìn)行調(diào)整和使用。

責(zé)任編輯：趙寧寧來(lái)源： GameOfTech

Go 代碼片段 Golang