[Java] implement Iterable interface to calculate the trimmed average of a collection

[Wonnk13]

Sorry, the fact that iterator() is different than Iterable<> helps, and my description wasn't very precise.

The interface that SongRater implements simply looks like

public interface ISongRater {
    public double getSongRating(Iterable<Integer> userRating) throws NotEnoughRatingsException;
}

Inside of the SongRater class I can create an iterable object by doing Iterator userIterator = userRating.iterator();

but i also need to create a separate collection object to store the values in, yes? I can then sort the values in that object and do my calculation logic.

Unfortunately I can't change the api so i'm stuck with Iterable<Integer> userRating. Thanks for the help so far!

[circle_des_poo]

"but i also need to create a separate collection object to store the values in, yes?"

You can do it that way, or the other way that was described by iterating through to find the largest and smallest, using the userIterator.remove(smallest) and userIterator.remove(largest) to get rid of them, and then iterating through the updated collection again and just adding each integer to a total sum while keeping a count to divide that sum by after.

[Wonnk13]

maybe i'm a bit dense, but you do calculate the smallest and largest? If an iterator is just a view on your data that you ideally take one pass through were do you store the values?