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Pointer type methods allow us to operate on pointer type values to improve code readability. Specifically, there are the following usage scenarios: operating on variable data, providing simple interfaces, and simulating object-oriented design patterns. By using a receiver pointer (which must be non-null), we can modify the pointer type value without a copy. Advantages include: readability, efficiency, and flexibility. But when using it, you need to pay attention to the non-nullity of the receiver pointer and use the address operator &.
Go language pointer type method practical guide to improve code readability
Pointer type method allows us to manipulate the value of pointer type Perform operations, a powerful way to implement object-oriented programming patterns in Go.
Syntax
The syntax of pointer type methods is as follows:
func (p *T) MethodName()
Where:
p
is the receiver, it must be a pointer to the type T
is the name of the type pointed to by the pointer MethodName
is the name of the methodUsage scenarios
Pointer type methods are very suitable for the following scenarios:
Practical case
The following is an example of using pointer type methods:
type Person struct { name string } func (p *Person) SetName(name string) { p.name = name } func main() { person := &Person{name: "John"} person.SetName("Alice") fmt.Println(person.name) // 输出: Alice }
In this example, the Person
type has a pointer type method SetName
, available to change the recipient's name. By pointing person
to an anonymous Person
value, we are able to modify its name
field using pointer type methods without creating a copy.
Advantages
Using pointer type methods has the following advantages:
Notes
When using pointer type methods, you need to pay attention to the following points:
&
must be used. By mastering pointer type methods, you can write Go language code that is more readable, efficient, and flexible.
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