creating and assigning values to a map in go code example

Example 1: length of map golang

package main
 
import "fmt"
 
func main() {
    var employee = make(map[string]int)
    employee["Mark"] = 10
    employee["Sandy"] = 20
 
    // Empty Map
    employeeList := make(map[string]int)
 
    fmt.Println(len(employee))     // 2
    fmt.Println(len(employeeList)) // 0
}

Example 2: go get from map

var id string
var ok bool
if x, found := res["strID"]; found {
     if id, ok = x.(string); !ok {
        //do whatever you want to handle errors - this means this wasn't a string
     }
} else {
   //handle error - the map didn't contain this key
}