使用Go语言编写简洁代码的最佳实践

// Bad:
func fn(x int) int {
    // ...
}
// Good:
func calculateFactorial(number int) int {
    // ...
}

// Bad:
func calculate(x int){y:=x+10;fmt.Println(y);}
// Good:
func calculate(x int) {
    y := x + 10
    fmt.Println(y)
}

// Bad:
if true {
for i := 0; i < 5; i++ {
fmt.Println(i)
}
}
// Good:
if true {
    for i := 0; i < 5; i++ {
        fmt.Println(i)
    }
}

// Bad:
func complexLogic(x int, y int) int {
    // 50 lines of code
}
// Good:
func calculateSum(x int, y int) int {
    return x + y
}
func calculateDifference(x int, y int) int {
    return x - y
}

// Bad:
if conditionA {
    if conditionB {
        if conditionC {
            // ...
        }
    }
}
// Good:
if conditionA && conditionB && conditionC {
    // ...
}

// Bad:
// Increment counter
counter++
// Good:
counter++

// Bad:
func divide(a, b int) int {
    return a / b // Division by zero not handled
}
// Good:
func divide(a, b int) (int, error) {
    if b == 0 {
        return 0, errors.New("division by zero")
    }
    return a / b, nil
}

// Bad:
var globalCounter int
func increment() {
    globalCounter++
}
// Good:
func increment(counter int) int {
    return counter + 1
}

// Bad:
func processUserData(user User) {
    // Does everything related to user data
}
// Good:
func saveUserData(user User) {
    // Save user data to the database
}
func sendWelcomeEmail(user User) {
    // Send a welcome email to the user
}

// Bad:
func calculateAreaOfCircle(radius float64) float64 {
    return 3.14159 * radius * radius
}
func calculateAreaOfRectangle(width float64, height float64) float64 {
    return width * height
}
// Good:
func calculateArea(shape string, params ...float64) float64 {
    switch shape {
    case "circle":
        return 3.14159 * params[0] * params[0]
    case "rectangle":
        return params[0] * params[1]
    }
    return 0
}

// Test
func TestCalculateSum(t *testing.T) {
    result := calculateSum(3, 5)
    if result != 8 {
        t.Errorf("Expected 8, but got %d", result)
    }
}

// Bad:
func customStringReverse(s string) string {
    // Custom implementation of string reversal
}
// Good:
import "strings"
func reverseString(s string) string {
    return strings.Reverse(s)
}

type Shape interface {
    Area() float64
}
type Circle struct {
    Radius float64
}
func (c Circle) Area() float64 {
    return 3.14159 * c.Radius * c.Radius
}

// Bad:
func fetchData() {
    if err := retrieveData(); err != nil {
        log.Fatal(err)
    }
}
// Good:
func fetchData() error {
    data, err := retrieveData()
    if err != nil {
        return err
    }
    // Process data
    return nil
}