Golang如何使用type定义自定义类型_Golang自定义类型定义方法汇总

type MyInt int
type StringList []string

type UserID int
var user1 UserID = 1001

type Person struct {
    Name string
    Age  int
}
type Rectangle struct {
    Width  float64
    Height float64
}

func (r Rectangle) Area() float64 {
    return r.Width * r.Height
}

type Celsius float64
<p>func (c Celsius) String() string {
return fmt.Sprintf("%.2f°C", c)
}</p><p>func (c <em>Celsius) SetFahrenheit(f float64) {
</em>c = Celsius((f - 32) * 5 / 9)
}

type Operation func(int, int) int
<p>func Add(a, b int) int { return a + b }
func Multiply(a, b int) int { return a * b }</p><p>var op Operation = Add
result := op(3, 4) // result = 7

type Speaker interface {
    Speak() string
}
<p>type Dog struct{}
func (d Dog) Speak() string { return "Woof!" }</p><p>type Cat struct{}
func (c Cat) Speak() string { return "Meow!" }

type Names []string
type ConfigMap map[string]interface{}
type MessageChan chan string

func (n Names) Has(name string) bool {
    for _, v := range n {
        if v == name {
            return true
        }
    }
    return false
}