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Method receivers in Go language are different from method receivers in other programming languages. In Go language: method receivers are located in the function signature, immediately after the function name. The method receiver is a value rather than a pointer, which makes it more lightweight.
Method receivers in different languages and Go language method receivers
In object-oriented programming, method receivers allow us Defines a method that operates on a specific object. The syntax and usage of method receivers may vary in different languages. This article will discuss the differences between method receivers in different languages and Go language method receivers.
Java
In Java, method receiver is called this
keyword. It refers to the object on which the method is called:
class MyClass { public void myMethod() { System.out.println(this); // 打印调用该方法的对象 } }
Python
In Python, a method receiver is the first parameter of a method. It is often called self
:
class MyClass: def my_method(self): print(self) # 打印调用该方法的对象
C
In C, a method receiver is passed to a method as the implicit first argument. It is accessed using the this
keyword:
class MyClass { public: void myMethod() { std::cout << this; // 打印调用该方法的对象 } };
Go
The Go language's method receivers are significantly different from other languages. The method receiver is located in the function signature, immediately after the function name:
type MyClass struct { // 字段 } func (myClass MyClass) myMethod() { // 实现 }
In the Go language, a method receiver is a value, not a pointer. This makes method receivers in Go more lightweight and avoids null pointer checks.
Practical case
The following is an example of implementing a similar method in Go language and Python:
Go language:
type Person struct { Name string } func (p Person) Greet() { fmt.Printf("Hello, %s!\n", p.Name) }
Python:
class Person: def __init__(self, name): self.name = name def greet(self): print("Hello, {}!".format(self.name))
As you can see, the method receiver in Go language is more concise because it does not require an explicit reference to the object.
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