语法易错点

• 传结构的值时，结构体的对象类型会被转换为接收者定义的类型

    dataList := []struct {
        dst  interface{}
        src  interface{}
        want interface{}
    }{
        //{PersonM{Name: "Alice", Age: 20}, PersonM{Age: 20, Name: "Alice"}, PersonM{Name: "Alice", Age: 20}},
        //{PersonM{Name: "Alice", Age: 20}, PersonM{Name: "Bob", Age: 20}, PersonM{Name: "Bob", Age: 20}},
        {&PersonM{Name: "Alice", Age: 20}, PersonM{Name: "Bob", Age: 21}, PersonM{Name: "Bob", Age: 21}},
        //{WomanM{Name: "Alice", Age: 20}, PersonM{Name: "Alice", Age: 20}, WomanM{Name: "Alice", Age: 20}},
        //{WomanM{Name: "Alice", Age: 20}, PersonM{Name: "Alice", Age: 20, Height: 170}, WomanM{Name: "Alice", Age: 20}},
        //{PersonM{Name: "Alice", Age: 20, Height: 170}, WomanM{Name: "Alice", Age: 21}, PersonM{Name: "Alice", Age: 21, Height: 170}},
        //{PersonM{Name: "Alice"}, WomanM{Name: "Bob", Age: 21}, PersonM{Name: "Bob", Age: 21}},
    }

• 值在使用时要初始化，不然会报访问nil对象
  runtime error: invalid memory address or nil pointer dereference\ngoroutine