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4f793a3569
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f8281d894b
13
opis.txt
13
opis.txt
@ -1,13 +0,0 @@
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Wybrany wzorzec: Iterator
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Kod zawiera klasy:
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Song - zawiera informacje o nazwie piosenki, nazwie artysty i długości
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Playlist - zawiera zbiór piosenek oraz funkcje generowania dla niej iteratora
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PlaylistIter - iterator klasy Playlist pozwalający na pobieranie kolejnych piosenek
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Funkcja main zawiera kod który:
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- tworzy plaliste
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- dodaje piosenki do playlisty
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- wykonuje pętle for na iteratorze stworzonym z Playlist'y i wypisuje informacje o każdej piosence
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Link do repozytorium: https://git.dawidpietrykowski.com/UMK/io_2
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11
src/main.rs
11
src/main.rs
@ -11,14 +11,12 @@ struct Playlist{
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}
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impl Playlist{
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// Empty constructor
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fn new() -> Playlist {
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Playlist{
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songs: Vec::new(),
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}
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}
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// Generates iterator from playlist
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fn iter(&self) -> PlaylistIterator{
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PlaylistIterator{
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playlist: self,
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@ -26,7 +24,6 @@ impl Playlist{
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}
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}
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// Adds a song to playlist
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fn add_song(&mut self, song: Song){
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self.songs.push(song);
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}
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@ -41,22 +38,15 @@ impl<'a> Iterator for PlaylistIterator<'a>{
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type Item = &'a Song;
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fn next(&mut self) -> Option<Self::Item> {
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// Attempts to get current song
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let song = self.playlist.songs.get(self.current_index as usize);
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// Moves id to next song
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self.current_index += 1;
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// Returns song or nothing
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song
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}
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}
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fn main() {
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// Creating a playlist
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let mut playlist = Playlist::new();
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// Adding songs to a playlist
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playlist.add_song(
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Song{
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name: String::from("s1"),
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@ -79,7 +69,6 @@ fn main() {
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}
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);
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// Iterating over playlist and printing song information
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for song in playlist.iter(){
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println!("{:?}", song);
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}
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