Let’s talk about several ways to create objects in golang

Go is a modern programming language, which is characterized by fast speed, high writing efficiency, and also provides convenient methods for object creation.

In Go language, objects are created through structures. A structure is a custom data type used to represent a set of related fields. Using structures can organize and manage complex data, making it easier for us to perform related operations. In Go, objects can be created in the following ways.

1. Literal initialization

Using literal initialization is one of the simplest ways. We can initialize the structure object by directly filling in the field values ​​​​with curly brackets when defining the structure. For example:

type Person struct {
    Name    string
    Age     int
}

func main() {
    p := Person{"Bob", 23}
}

In the above code, we initialize an instance of the Person structure by filling "{ }" with the two values ​​​​of "Bob" and 23.

2. new function

The built-in function new of Go language can be used to create a zero-value object and return the pointer of the object. The zero value refers to the default value of a variable of the same type when it is not assigned a value. For example, a zero value of type int is 0, and a zero value of type string is the empty string.

We can use the new function to create the pointer type of the structure. The following is an example:

type Person struct {
    Name    string
    Age     int
}

func main() {
    p := new(Person)
    p.Name = "Bob"
    p.Age = 23
}

In the above code, we first use the new function to create a pointer p of type Person. Then, we can access the fields in the structure through p.Name and p.Age and assign values ​​to them.

3. &Address symbol

The Go language allows us to use the &Address symbol to create a pointer to a structure. The following is an example:

type Person struct {
    Name    string
    Age     int
}

func main() {
    p := &Person{"Bob", 23}
}

In the above code, we use the & symbol to take the address of the Person structure and assign it to the pointer variable p.

4. Combining literals and new functions

We can also create instances of structures by combining literals and new functions. For example:

type Person struct {
    Name    string
    Age     int
}

func main() {
    p := &Person{Name: "Bob", Age: 23}
}

In the above code, we use the & symbol to get the address of the Person structure, and use "{ }" to fill in the values ​​of the Name and Age fields.

The ways to create objects in the Go language are diverse, and developers can flexibly choose the method that suits them. Through reasonable object creation, we can better manage data and improve program efficiency.

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