public KeepOrderedEnumerable(IKeepEnumerable <TSource> source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
_orders = new List <IOrderedParameters <TSource> >(source.Orders ?? Enumerable.Empty <IOrderedParameters <TSource> >());
}
private static IEnumerable <TSource> OrderBy <TSource>(this IEnumerable <TSource> source, IKeepEnumerable <TSource> keep
, out Func <int[]> keepDenseRank)
{
foreach (IOrderedParameters <TSource> parameters in keep.Orders.Reverse())
{
source = parameters.Sort(source);
}
keepDenseRank = source.GetKeepDenseRank(keep.Orders);
return(source);
}
public static IKeepOrderedEnumerable <TSource> OrderBy <TSource, TKey>(this IKeepEnumerable <TSource> source
, Func <TSource, TKey> keySelector)
{
return(new KeepOrderedEnumerable <TSource>(source).Add(keySelector));
}
public static IKeepOrderedEnumerable <TSource> OrderByDescending <TSource, TKey>(this IKeepEnumerable <TSource> source
, Func <TSource, TKey> keySelector, Func <TKey, TKey, int> comparer)
{
return(source.OrderByDescending(keySelector, new LambdaComparer <TKey>(comparer)));
}
public static IKeepOrderedEnumerable <TSource> OrderByDescending <TSource, TKey>(this IKeepEnumerable <TSource> source
, Func <TSource, TKey> keySelector, IComparer <TKey> comparer)
{
return(new KeepOrderedEnumerable <TSource>(source).Add(keySelector, comparer, true));
}
