Mastering Go - Second Edition

Using a map with pointers

In this subsection, we are going to use a map for storing all our pointers as integers. The name of the program is mapStar.go and it contains the following Go code:

package main 
 
import ( 
   "runtime" 
) 
 
func main() { 
   var N = 40000000 
   myMap := make(map[int]*int) 
   for i := 0; i < N; i++ { 
         value := int(i) 
         myMap[value] = &value 
   } 
   runtime.GC() 
   _ = myMap[0] 
} 

The name of the map that stores the integer pointers is myMap. A for loop is used for putting the integer values into the map.