How to use constants in Golang
What is a Constant or Const in Golang? Here's what you need to know about using constants in Go.
Methods with the same name in Golang
Golang allows creating two or more methods with the same name in the same package, but the receivers of these methods must be of different types. This feature is not available in Go functions, which means you are not allowed to create methods with the same name in the same package, if you try to do so, the compiler will throw an error.
Syntax:
func(reciver_name_1 Type) method_name(parameter_list)(return_type){
// Code
}
func(reciver_name_2 Type) method_name(parameter_list)(return_type){
// Code
}Let's look at the following example to better understand methods with the same name in Golang:
Example 1:
// Chương trình Go minh họa cách
// tạo các phương thức cùng tên
package main
import "fmt"
// Tạo các cấu trúc
type student struct {
name string
branch string
}
type teacher struct {
language string
marks int
}
// Các phương thức cùng tên nhưng với
// kiểu receiver khác nhau
func (s student) show() {
fmt.Println("Name of the Student:", s.name)
fmt.Println("Branch: ", s.branch)
}
func (t teacher) show() {
fmt.Println("Language:", t.language)
fmt.Println("Student Marks: ", t.marks)
}
// Hàm chính
func main() {
// Khởi tạo các giá trị
// of the structures
val1 := student{"Rohit", "EEE"}
val2 := teacher{"Java", 50}
// Gọi các phương thức
val1.show()
val2.show()
}
Result:
Name of the Student: Rohit
Branch: EEE
Language: Java
Student Marks: 50Explanation: In the above example, we have two methods with the same name i.e. show() but with different types. Here, the first show() method contains s of type student and the second show() method contains t of type teacher . And in the main() function, we call both the methods with the help of their respective structure variables. If you try to create these show() methods with the same type, then the compiler will throw an error.
Example 2:
// Chương trình Go minh họa cách
// tạo các phương thức cùng tên
// với receiver không phải struct
package main
import "fmt"
type value_1 string
type value_2 int
// Tạo hàm cùng tên với
// các kiểu receiver không phải struct khác nhau
func (a value_1) display() value_1 {
return a + "forGeeks"
}
func (p value_2) display() value_2 {
return p + 298
}
// Hàm chính
func main() {
// Khởi tạo giá trị này
res1 := value_1("Geeks")
res2 := value_2(234)
// Hiện kết quả
fmt.Println("Result 1: ", res1.display())
fmt.Println("Result 2: ", res2.display())
}
Result:
Result 1: GeeksforGeeks
Result 2: 532Volatile functions in Golang
Variadic functions in Go allow you to pass a variable number of arguments to a function. Here's everything you need to know about variadic functions in Golang.
Named return parameters in Golang
In Golang, named return parameters are often referred to as named parameters. Golang allows naming the return parameters or results of functions in the function signature or definition.
Keywords in Go
Keyword - Keywords are words in a language that are used for some internal processes or represent some predefined actions. Here is what you need to know about keywords in Golang.
Data types in Golang
Data types specify what type of data a valid Go variable can hold. In the Go language, types are divided into four categories as follows:
Function arguments in Golang
Go supports two main ways to pass arguments: Pass by Value and Pass by Reference. Go uses pass by value by default.
Function returning multiple values in Golang
In Go language, you are allowed to return multiple values from a function, using the return statement. In other words, in a function, a return statement can return multiple values.
Switch Statement in Go
Golang like most other programming languages has switch statement. Here is how to use switch statement in Golang.
Cases to know when using selection statements in Golang
In this article, we will learn how to use default case to avoid deadlock. But first, we will learn what is deadlock case when using select command in Golang?
Anonymous structures and fields in Golang
Anonymous structs in Golang are temporary structures with no names used for one-time purposes, while anonymous fields allow embedding of unnamed fields.
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What is Rune in Golang? How to use Rune in Golang? This article will give you the answer.
How to use operators in Golang
Operators allow us to perform different types of operations on operands. In Go language, operators can be classified based on their different functions.
Void identifier in Golang
_(underscore) in Golang is called Blank Identifier. Identifier is a user-defined name of program elements used for identification purposes.
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Hello, World! is the first basic program in any programming language. You can write this first program in Golang by following the steps below.
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Golang can be easily installed on Windows. Here is a step-by-step guide to install Golang on Windows.
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