public IOrderedEnumerable <T> CreateOrderedEnumerable <TKey>(Func <T, TKey> keySelector, IComparer <TKey> keyComparer, bool descending)
{
var secondComparer = new MyComparer <T, TKey>(keySelector, keyComparer);
Comparers.Add(secondComparer);
return(new MyOrderedEnumerable <T>(this, Comparers));
}
public ChainComparer(IEnumerable <IComparer <T> > comparers, IEnumerable <IEqualityComparer <T> > equalityComparers)
{
if (comparers != null)
{
foreach (IComparer <T> comparer in comparers.Where(e => e != null))
{
Comparers.Add(comparer);
}
}
if (equalityComparers != null)
{
foreach (IEqualityComparer <T> equalityComparer in equalityComparers.Where(e => e != null))
{
EqualityComparers.Add(equalityComparer);
}
}
}
public MultiStepComparer(IComparer <T> primaryComparer, params IComparer <T>[] secondaryComparers)
{
Comparers.Add(primaryComparer);
Comparers.AddRange(secondaryComparers);
}
public MultiStepComparer(IComparer <T> primaryComparer, IEnumerable <IComparer <T> > secondaryComparers)
{
Comparers.Add(primaryComparer);
Comparers.AddRange(secondaryComparers);
}