Use-a and Has-a in the Golang

This is a creation in Article, where the information may have evolved or changed.

Type person struct {    Name    string    address Address}type Address struct {number    string    Street string< C6/>city   string    state  string,    Zip    string}func (P *person) talk () {    fmt. Println ("Hi, my Name is", P.name)}func (P *address) location () {    //fmt. Println ("I ' m at", P.address.number, P.address.street, p.address.city, P.address.state, P.address.zip)    FMT. Println ("I ' m at", P.number, P.street, p.city, P.state, P.zip)}func main () {    p: = person{        Name: "Steve",        Ad dress:address{number            : "$",            Street: "Main", City            :   "Gotham", State            :  "NY",            Zip :    "01313",        },      }    p.talk ()    //P.location () wrong    p.address.location ()}

Above is a "use-a" code snippet, but note " address is still a different object, except that it exists in person. "

Type person struct {    Name string    address}type Address struct {number    string    Street string    City   string    State  string    Zip    string}func (P *person) talk () {    fmt. Println ("Hi, my Name is", P.name)}func (P *address) location () {    //fmt. Println ("I ' m at", P.address.number, P.address.street, p.address.city, P.address.state, P.address.zip)    FMT. Println ("I ' m at", P.number, P.street, p.city, P.state, P.zip)}func main () {    p: = person{        Name: "Steve",        Ad dress:address{number            : "$",            Street: "Main", City            :   "Gotham", State            :  "NY",            Zip :    "01313",        },      }       p.talk ()    p.location ()    p.address.location ()}

Above is a "is-a" code snippet, but note " is-a relationships are implemented by introducing anonymous domains (person). The person is an anonymous domain (anonymous field) for citizen, and the anonymous field gives only the object type, not the name of the type. With an anonymous domain, citizen can access all the attributes (domains) and methods in the person. ".

Part of the code and text to go is the object-oriented language? 》。