Golang并发编程进阶技术：揭秘Goroutines的错误处理策略

package main

import (
    "fmt"
    "errors"
)

func divide(dividend, divisor float64) (float64, error) {
    if divisor == 0 {
        return 0, errors.New("division by zero")
    }
    return dividend / divisor, nil
}

func main() {
    result, err := divide(10, 0)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }
    fmt.Println("Result:", result)
}

package main

import (
    "fmt"
    "log"
)

func main() {
    _, err := someFunction()
    if err != nil {
        log.Println("Error:", err)
        return
    }
    // other code
}

package main

import (
    "fmt"
)

func worker(jobCh <-chan int, errorCh chan<- error) {
    for job := range jobCh {
        err := doSomeWork(job)
        if err != nil {
            errorCh <- err
        }
    }
}

func main() {
    jobCh := make(chan int)
    errorCh := make(chan error)

    go func() {
        for err := range errorCh {
            fmt.Println("Error:", err)
        }
    }()

    for i := 0; i < 10; i++ {
        go worker(jobCh, errorCh)
    }

    // send jobs to jobCh
    // close jobCh when all jobs are sent

    close(errorCh)

    // wait for all Goroutines to finish
}

package main

import (
    "context"
    "fmt"
    "time"
)

func someFunction(ctx context.Context) error {
    select {
    case <-time.After(5 * time.Second):
        return nil
    case <-ctx.Done():
        return ctx.Err()
    }
}

func main() {
    ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
    defer cancel()

    errCh := make(chan error)
    go func() {
        errCh <- someFunction(ctx)
    }()

    select {
    case err := <-errCh:
        if err != nil {
            fmt.Println("Error:", err)
        } else {
            fmt.Println("No error")
        }
    case <-ctx.Done():
        fmt.Println("Timeout")
    }
}