try to fill slice with struct and method in golang-CodePudding

I want to create a struct movie with the property title and genre data type string, then duration and year data type integer then create a function with the name addDataFilm to add the data object from the struct to the dataFilm slice, then display the data:

like this

this is my code :

type movie struct {
    title, genre   string
    duration, year int
}

func (m movie) addDataFilm(title string, genre string, duration int, year int, dataFilm *[]string) {
    var d = strconv.Itoa(m.duration)
    var y = strconv.Itoa(m.year)
    *dataFilm = append(*dataFilm, m.title, m.genre, d, y)
}

func main(){
        var dataFim = []string{}
    var dd = movie{}

    dd.addDataFilm("LOTR", "action", 120, 1999, &dataFim)
    dd.addDataFilm("Avanger", "action", 120, 2004, &dataFim)
    dd.addDataFilm("Spiderman", "action", 120, 2004, &dataFim)
    dd.addDataFilm("Juon", "horror", 120, 2004, &dataFim)

    fmt.Println(dataFim)
}

all i got is :

this

any help will be appreciated. thank you in advance

CodePudding user response：

create struct new array of Movies
create global variable Movies to save data
call variable on func main

type Movie struct {
    Title    string
    Genre    string
    Duration int
    Year     int
}

type Movies []Movie

var dest Movies

func addDataFilm(title string, genre string, duration int, year int) Movies {

    dest = append(dest, Movie{
        Title:    title,
        Genre:    genre,
        Duration: duration,
        Year:     year,
    })

    return dest
}

func TestNumberToAlphabet(t *testing.T) {
    addDataFilm("LOTR", "action", 120, 1999)
    addDataFilm("Avanger", "action", 120, 2004)
    addDataFilm("Spiderman", "action", 120, 2004)
    addDataFilm("Juon", "horror", 120, 2004)

    fmt.Println(dest)

}

CodePudding user response：

Create a slice of movies. Append each movie to the slice. To print, range over the slice and print each movie.

var movies []*movie
movies = append(movies, &movie{"LOTR", "action", 120, 1999})
movies = append(movies, &movie{"Avanger", "action", 120, 2004})
movies = append(movies, &movie{"Spiderman", "action", 120, 2004})
movies = append(movies, &movie{"Juon", "horror", 120, 2004})
for i, m := range movies {
    fmt.Printf("%d. Title: %s\n   Genre: %s\n   Duration: %d\n   Year: %d\n\n", i 1, m.title, m.genre, m.duration, m.year)
}

Run the program on the playground.

The logic can be wrapped up in a type:

// dataFilms stores data for multiple films.
type dataFilms []*movie

func (df *dataFilms) add(title string, genre string, duration int, year int) {
    *df = append(*df, &movie{title, genre, duration, year})
}

func (df dataFilms) print() {
    for i, m := range df {
        fmt.Printf("%d. Title: %s\n   Genre: %s\n   Duration: %d\n   Year: %d\n\n", i 1, m.title, m.genre, m.duration, m.year)
    }
}

func main() {
    var df dataFilms
    df.add("LOTR", "action", 120, 1999)
    df.add("Avanger", "action", 120, 2004)
    df.add("Spiderman", "action", 120, 2004)
    df.add("Juon", "horror", 120, 2004)
    df.print()
}

Run it on the playground.