十个Golang开发中应该避免的错误总结

_, err := os.Open("file.txt")
if err != nil {
    log.Fatal(err)
}

func increment(x int) {
    x++
}

func incrementWithPointer(x *int) {
    *x++
}

ch := make(chan int)
go func() {
    ch <- 42
}()
<-ch

f, err := os.Open("file.txt")
if err != nil {
    log.Fatal(err)
}
defer f.Close()

// Using a slice instead of a map
var m map[string]int
for i, v := range []string{"a", "b", "c"} {
    m[v] = i
}
// Using a map instead of a slice
var s []int
for i := range map[string]int{"a": 0, "b": 1, "c": 2} {
    s = append(s, i)
}

for i := 0; i < 10; i++ {
    go func() {
        fmt.Println(i)
    }()
}

var counter int64
func incrementCounter() {
    atomic.AddInt64(&counter, 1)
}

// Using float64 instead of int
sum := 0.0
for i := 0; i < 10; i++ {
    sum += 0.1
}

// Using int instead of float64
sum := 0
for i := 0; i < 10; i++ {
    sum += 0.1
}

func reverse(s string) string {
    b := []rune(s)
    for i := 0; i < len(b)/2; i++ {
        j := len(b) - i - 1
        b[i], b[j] = b[j], b[i]
    }
    return string(b)
}

type Logger interface {
    Log(message string)
}

func Log(l Logger, message string) {
    l.Log(message)
}

func TestSum(t *testing.T) {
    got := Sum(1, 2)
    want := 3
    if got != want {
        t.Errorf("Sum(1, 2) = %d, want %d", got, want)
    }
}