1. Higher Order functions
In Go,language, a function is called a Higher order function it should full fills one of the below conditions.
1. Passing function as an argument to other function.
func(f) f
Note : passing function as an argument is also known as a callback function or first-class function
2. Returning Functions From Another Functions
func fun(f) f{
return func(){
//body
}
}
Ex:1
func sum(add func(a,b, int) int){
fmt.println(add(30,20))
}
func main(){
f := func(a, b int) int {
return a+b
}
sum(f)
}
Ex:2
In this example we defined simple as return function
func simple() func(a,b int) int{
f := func(a,b int) int{
return a+b
}
return f
}
func main(){
s:= simple()
fmt.println(s(20,30))
}
2. Anonymous functions
A function without any name is called antonymous function
Ex:1
first := func(){
fmt.Println("inside the anonymous function")
}
first()
fmt.println("%T", first)
Ex:2
func(str string){
fmt.println("inside the anonymous function", str)
}("sk")
3. User defined function type
in the below example add is the user defined type as function
type add func(a, b int) int
func main(){
var a add = func(a , b int) int{
return a+b
}
s :=a(50,5)
fmt.println("sum", s)
}
Top comments (1)
More useful links in GO
dev.to/c4r4x35/golang-useful-links...