reflect.Cap() Function in Golang with Examples
Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Cap() Function in Golang is used to get the v’s capacity. To access this function, one needs to imports the reflect package in the program.
Syntax:
func (v Value) Cap() intParameters: This function does not accept any parameters.
Return Value: This function returns the integer value.
Below examples illustrate the use of the above method in Golang:
Example 1:
C
// Golang program to illustrate // reflect.Cap() Function package main import ( "fmt" "reflect" ) func main() { c := make(chan int , 1) vc := reflect.ValueOf(c) succeeded := vc.TrySend(reflect.ValueOf(123)) // use of Cap() method fmt.Println(succeeded, vc.Len(), vc.Cap()) } |
Output:
true 1 1
Example 2:
C
// Golang program to illustrate // reflect.Cap() Function package main import ( "fmt" "reflect" ) // Main function func main() { var val chan string var strVal reflect.Value = reflect.ValueOf(&val) indirectStr := reflect.Indirect(strVal) value := reflect.MakeChan(indirectStr.Type(), 1024) // use of Cap() method fmt.Printf( "Type : [%v] \nCapacity : [%v]" , value.Kind(), value.Cap()) } |
Output:
Type : [chan] Capacity : [1024]