reflect.MakeMapWithSize() Function in Golang with Examples

// Golang program to illustrate
// reflect.MakeMapWithSize() Function
  
package main
  
import (
    "fmt"
    "reflect"
)
 
// Main function
func main() {
 
    var str map[int]string 
    var n int
    n=10
     
    var strValue reflect.Value = reflect.ValueOf(&str)
 
    indirectStr := reflect.Indirect(strValue)
     
    //Use of MakeMapWithSize() method
 
    valueMap := reflect.MakeMapWithSize(indirectStr.Type(), n)
     
    fmt.Printf("ValueMap is [%v] .", valueMap)
 
}

// Golang program to illustrate
// reflect.MakeMapWithSize() Function
  
package main
  
import (
    "fmt"
    "reflect"
)
 
// Main function
func main() {
     
    intSlice := make([]int, 0)
    mapStringInt := make(map[string]int)
 
    sliceType := reflect.TypeOf(intSlice)
    mapType := reflect.TypeOf(mapStringInt)
 
    intSliceReflect := reflect.MakeSlice(sliceType, 0, 0)
    mapReflect := reflect.MakeMapWithSize(mapType, 100)
 
    v := 100
    rv := reflect.ValueOf(v)
    intSliceReflect = reflect.Append(intSliceReflect, rv)
    intSlice2 := intSliceReflect.Interface().([]int)
    fmt.Println(intSlice2)
 
    k := "GeeksforGeeks"
    rk := reflect.ValueOf(k)
    mapReflect.SetMapIndex(rk, rv)
    mapStringInt2 := mapReflect.Interface().(map[string]int)
    fmt.Println(mapStringInt2)
 
}