Golang结构体指针切片操作详解

type Person struct {
    Name string
    Age  int
}

// 声明并初始化结构体指针切片
var people []*Person
people = append(people, &Person{Name: "Alice", Age: 30})

for _, p := range people {
    if p.Name == "Alice" {
        p.Age = 31  // 直接修改原结构体字段
    }
}

persons := make([]*Person, 5)  // 长度为5，但每个元素是nil
for i := 0; i < len(persons); i++ {
    persons[i] = &Person{Name: fmt.Sprintf("User%d", i), Age: 20 + i}
}

for _, p := range persons {
    if p != nil {
        fmt.Println(p.Name)
    }
}

func updateAges(people []*Person) {
    for _, p := range people {
        p.Age++
    }
}