Go（Golang）的10个常见代码片段用于各种任务
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?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?
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?
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)
}
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。
- 发表于:
- 原文链接：https://page.om.qq.com/page/OF-F_hyThsj5mi6p4OzJgfcA0
- 腾讯「腾讯云开发者社区」是腾讯内容开放平台帐号（企鹅号）传播渠道之一，根据《腾讯内容开放平台服务协议》转载发布内容。
- 如有侵权，请联系 cloudcommunity@tencent.com 删除。
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