C# predicate example

withoutpredicate.cs

public List<int> GetWeekdaysWithIntervalOverlaps(IEnumerable<int> selectedWeekdays, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId);
    var overlappingDays = selectedWeekdays
        .Where(weekdayIndex => IsOverlapped(playtimeRules, interval, weekdayIndex))
        .ToList();
    return overlappingDays;
}

public bool IsWeekdayWithIntervalOverlaps(int selectedWeekday, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId, int channelPlaylistItemId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId)
      .Where(o => o.ID != channelPlaylistItemId);
    return IsOverlapped(playtimeRules, interval, selectedWeekday);
}

withpredicate.cs

private Func<int, bool> IsWeekdayOverlapped(ChannelPlaylistPlaytimeRuleInterval interval, IQueryable<ChannelPlaylistPlaytimeRule> playtimeRules)
{
    return weekdayIndex => IsOverlapped(playtimeRules, interval, weekdayIndex);
}

public List<int> GetWeekdaysWithIntervalOverlaps(IEnumerable<int> selectedWeekdays, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId);
    var overlappingDays = selectedWeekdays
        .Where(IsWeekdayOverlapped(interval, playtimeRules))
        .ToList();
    return overlappingDays;
}

public bool IsWeekdayWithIntervalOverlaps(int selectedWeekday, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId, int channelPlaylistItemId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId)
      .Where(o => o.ID != channelPlaylistItemId);
    return IsWeekdayOverlapped(interval, playtimeRules)(selectedWeekday);
}

withpredicate2.cs

private static Func<ChannelPlaylistPlaytimeRule, bool> IsOverlappingSelectedWeekdayInterval(int selectedWeekday, ChannelPlaylistPlaytimeRuleInterval interval)
{
    return o => o.WeekdayID == selectedWeekday && interval.IsOverlapped(o);
}

public List<int> GetWeekdaysWithIntervalOverlaps(IEnumerable<int> selectedWeekdays, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId).ToList();
    var overlappingDays = selectedWeekdays
        .Where(selectedWeekday => playtimeRules.Any(IsOverlappingSelectedWeekdayInterval(selectedWeekday, interval)))
        .ToList();

    return overlappingDays;
}

public bool IsWeekdayWithIntervalOverlaps(int selectedWeekday, ChannelPlaylistPlaytimeRuleInterval interval, int channelPlaylistId, int channelPlaylistItemId)
{
    var playtimeRules = GetChannelPlaylistPlaytimeRules(channelPlaylistId)
      .Where(o => o.ID != channelPlaylistItemId);

    return playtimeRules.Any(IsOverlappingSelectedWeekdayInterval(selectedWeekday, interval));
}