洞察源码，发现几乎都是使用option模式进行加载参数来实现的
1.先上代码
package main
import "fmt"
type Customer struct {
id int
name string
gender string
phone string
age int8
}
type Option func(customer *Customer)
func WithId(id int) Option {
return func(customer *Customer) {
customer.id = id
}
}
func WithGender(gender string) Option {
return func(customer *Customer) {
customer.gender = gender
}
}
func WithName(name string) Option {
return func(customer *Customer) {
customer.name = name
}
}
func WithPhone(phone string) Option {
return func(customer *Customer) {
customer.phone = phone
}
}
func WithAge(age int8) Option {
return func(customer *Customer) {
customer.age = age
}
}
func NewCustomer(options ...Option) Customer {
customer := Customer{}
for _, option := range options {
// 用户自定义的初始化函数
option(&customer)
}
return customer
}
func main() {
customer := NewCustomer(WithAge(20),WithId(1), WithName("lazyr"), WithGender("man"), WithPhone("192993939393"))
fmt.Println(customer)
}
总结：实际是闭包的应用，代码用得很巧妙
