pub fn from(files: &[PathBuf]) -> Self {
        let (tx, rx) = mpsc::channel();
        let pool = ThreadPool::new_exclusive(N_WORKERS).expect("Failed to create thread pool");

        // Command line arguments are scanned for files, also in
        // subdirectories. The enumerate() is used to keep the order
        // as it was received from the user.
        for (i, path) in enumerate(files)
            .map(|(i, f)| std::iter::repeat(i).zip(f.contents()))
            .flatten()
        {
            let thread_tx = tx.clone();
            pool.push(move || {
                thread_tx
                    .send((i, Song::from(path)))
                    .expect("Failed to send Song to Playlist");
            })
            .expect("Failed to push thread to pool");
        }

        // Close the channel and wait for threads to finish
        drop(tx);
        drop(pool);

        // Sort Songs returned from worker threads based on
        //   1. The original order (i.e. order of command line arguments)
        //   2. Based on the album
        //   3. Based on the track number
        let store: Vec<Song> = rx
            .iter()
            .filter_map(|(i, song)| Some((i, song?)))
            .sorted_by_key(|(i, song)| (*i, song.album_info.to_string(), song.track_number))
            .map(|(_i, song)| song)
            .collect();

        if store.is_empty() {
            eprintln!("No playable files provided\n");
            crate::print_usage_and_exit();
        }

        Self {
            store,
            currently_playing: 0,
        }
    }
/// Converts the pathnames in `files` into `Song`s and returns them
/// as a `Playlist`. If one of `files` cannot be opened as an audio
/// stream, it is quietly ignored and not added to the playlist.
///
/// Each song is created in a new thread. from() returns when every
/// thread has finished.


Each song is created in a new thread. from() returns when every
thread has finished.
Each song is created in a new thread . from () returns when every thread has finished .
pub fn from(files: &[PathBuf]) -> Self {
        let (tx, rx) = mpsc::channel();
        let pool = ThreadPool::new_exclusive(N_WORKERS).expect("Failed to create thread pool");
        // Command line arguments are scanned for files, also in
        // subdirectories. The enumerate() is used to keep the order
        // as it was received from the user.
        for (i, path) in enumerate(files)
            .map(|(i, f)| std::iter::repeat(i).zip(f.contents()))
            .flatten()
        {
            let thread_tx = tx.clone();
            pool.push(move || {
                thread_tx
                    .send((i, Song::from(path)))
                    .expect("Failed to send Song to Playlist");
            })
            .expect("Failed to push thread to pool");
        }
        // Close the channel and wait for threads to finish
        drop(tx);
        drop(pool);
        // Sort Songs returned from worker threads based on
        //   1. The original order (i.e. order of command line arguments)
        //   2. Based on the album
        //   3. Based on the track number
        let store: Vec<Song> = rx
            .iter()
            .filter_map(|(i, song)| Some((i, song?)))
            .sorted_by_key(|(i, song)| (*i, song.album_info.to_string(), song.track_number))
            .map(|(_i, song)| song)
            .collect();
        if store.is_empty() {
            eprintln!("No playable files provided\n");
            crate::print_usage_and_exit();
        }
        Self {
            store,
            currently_playing: 0,
        }
    }
pub fn from ( files : & [ PathBuf ] ) -> Self { let ( tx , rx ) = mpsc :: channel ( ) ; let pool = ThreadPool :: new_exclusive ( N_WORKERS ) . expect ( " " ) ; // Command line arguments are scanned for files, also in // subdirectories. The enumerate() is used to keep the order // as it was received from the user. for ( i , path ) in enumerate ( files ) . map ( | ( i , f ) | std :: iter :: repeat ( i ) . zip ( f . contents ( ) ) ) . flatten ( ) { let thread_tx = tx . clone ( ) ; pool . push ( move | | { thread_tx . send ( ( i , Song :: from ( path ) ) ) . expect ( " " ) ; } ) . expect ( " " ) ; } // Close the channel and wait for threads to finish drop ( tx ) ; drop ( pool ) ; // Sort Songs returned from worker threads based on //   1. The original order (i.e. order of command line arguments) //   2. Based on the album //   3. Based on the track number let store : Vec < Song > = rx . iter ( ) . filter_map ( | ( i , song ) | Some ( ( i , song ? ) ) ) . sorted_by_key ( | ( i , song ) | ( * i , song . album_info . to_string ( ) , song . track_number ) ) . map ( | ( _i , song ) | song ) . collect ( ) ; if store . is_empty ( ) { eprintln ! ( " \n " ) ; crate :: print_usage_and_exit ( ) ; } Self { store , currently_playing : 0 , } }
Converts the pathnames in `files` into `Song`s and returns them
as a `Playlist`.
Converts the pathnames in ` files ` into ` Song ` s and returns them as a ` Playlist ` .
files
&[PathBuf]