Mutables

Go

package main
 
import (
    "fmt"
    "strings"
)
 
    thing[index] = strings.ToUpper(thing[index])
}
 
func upone_map(thing map[string]string, index string) {
    thing[index] = strings.ToUpper(thing[index])
}
 
func main() {
    // mutable
    upone_list(list, 1)
    fmt.Println(list) // [a B c]
 
    // mutable
    dict := map[string]string{
        "a": "anders",
        "b": "bengt",
    }
    upone_map(dict, "b")
}