I like switch in Go.

func main() {
	all := []string{"Denver", "London", "NY", "SF"}

	for _, city := range all {
		switch city {
		case "Denver":
			// code for Denver
			fmt.Println("Denver")
		case "London", "SF": // London OR SF the same logic
			// code for London/SF
			fmt.Println("London/SF")
		case "NY":
			// code for NY
			fmt.Println("NY")
		default:
			// code default
			fmt.Println("default")
		}
	}
}

Very easy to use, we just create cases and what to do by default: