json.Unmarshal vs json.NewDecoder.Decode: which to choose for parsing JSON in Go?

Hi everyone! I just started learning Go and encountered a problem choosing between `json.Unmarshal` and `json.NewDecoder.Decode` for parsing JSON. Both methods do the same thing — decode JSON into a struct, but the documentation says there are nuances. Here's an example I wrote: ```go package main import ( "encoding/json" "fmt" "strings" ) type User struct { Name string `json:"name"` Age int `json:"age"` } func main() { jsonStr := `{"name": "Alice", "age": 30}` // Option 1 var user1 User err := json.Unmarshal([]byte(jsonStr), &user1) if err != nil { fmt.Println("Unmarshal error:", err) } fmt.Println(user1) // Option 2 var user2 User decoder := json.NewDecoder(strings.NewReader(jsonS