Go language interface learning notes

Preface

         Studying recently Go Language , See the interface . Because I was engaged in Python, It advocates object-oriented programming . and Go The language is somewhat different ,Go It advocates interface oriented programming , therefore Go Language interface is particularly important .

         I just learned Go Language soon , I want to write my understanding of the interface , If there are mistakes or better understanding methods , Please correct me .

One 、 What is an interface

         An interface is an abstract type , Is a collection of methods in code . Interfaces are like defining the code of conduct for methods , Whatever your type , Whatever you can achieve .【 If you “ Quack quack ” It's called , Then you are the duck (?)】

Two 、 Interface implementation

         The most basic interface consists of interface Type and one or more methods

2.1 Interface declaration

type  The interface name  interface {
	 Method 1( Parameters )  Return value 
	 Method 2( Parameters )  Return value 
	 Method 3( Parameters )  Return value 
}

2.2 Method statement

        Go The method is a function with a specific receiver .Go The function in is defined by Function name , Parameters , Return value , The body of the function constitute , Method receives more values on the basis of function ：

func ( The receiver , Receiver type )  Method name ( Receiving parameters ) ( Return value ){
	 The body of the function 
} 

2.3 How to implement the interface

        for instance , The following defines an interface called buyer, There's a buy Methods

type buyer interface {
	buy()
}

        Define a string type

type Microsoft string

        Make the string type pass buyer Interface call buy Method

// Realized buy Interface , Print 
func (m Microsoft) buy() {
	fmt.Println("Activision and Blizzard is mine")
}

func main() {
	// Make a statement buyer Interface xbox
	var xbox buyer
	// Instantiation Microsoft to xbox
	xbox = Microsoft("I'm rich")
	// Calling method 
	xbox.buy()
}

        The whole process ： First define a Microsoft , Let me define one more buy The way to acquire Activision Blizzard , Then declare a buyer It's called xbox, Then instantiate Microsoft to pay xbox, As a buyer xbox To realize buy Methods , Buy Activision Blizzard .（ Rub a hot spot ）

Blind summary

        An essay with a little idea suddenly , The above is just a little bit of my superficial understanding , If you show timidity, please correct ！

         Interface nesting , Empty interface, etc. I'll digest it well and then continue to write , Suddenly switch to Go Language acceptance is not very good , It's still too much .

        Is it a duck that quacks ？