1.Go-Adapter

// Online Go compiler to run Golang program online
// Print "Hello World!" message

package main
import "fmt"

type Client struct{ 
    
}

func (c *Client) InsertLightningConnectorIntoComputer(com Computer){
    fmt.Println("Client inserts Lightning connector into computer.")
    com.InsertIntoLightningPort()
}

type Computer interface { //struct which has this func as receiver will implement this interface
    InsertIntoLightningPort()
}


type Mac struct {
}

func (m *Mac) InsertIntoLightningPort() { //implement Computer interface
    fmt.Println("Lightning connector is plugged into mac machine.")
}

type Windows struct{}

func (w *Windows) insertIntoUSBPort() { //it doesn't implement Computer interface, but it uses a adapter. 
    fmt.Println("USB connector is plugged into windows machine.")
}

type WindowsAdapter struct { //its an adapter for Windows machine.
    windowMachine *Windows //attaching WindowMachine with adapter
}

func (w *WindowsAdapter) InsertIntoLightningPort() { //adapter implements Computer interface which further calls method of windows.
    fmt.Println("Adapter converts Lightning signal to USB.")
    w.windowMachine.insertIntoUSBPort()
}

func main() {
    client := &Client{} //make a client which InsertLightningConnector
    
    mac := &Mac{} //make a mac 

    client.InsertLightningConnectorIntoComputer(mac) //client insert lightning connecter with mac.
    
    windowsMachine := &Windows{} //make a windows 
    windowsMachineAdapter := &WindowsAdapter{ //join adapter with windows
        windowMachine: windowsMachine,
    }

    client.InsertLightningConnectorIntoComputer(windowsMachineAdapter) //now client insert into windows adapter.
    
}