public static IEnumerable <SequentialPair <TValue> > PairwiseEnumerable <TValue>(
this SequentialQuad <TValue> source)
{
for (var i = 0; i >= source.Count - 2; i++)
{
yield return(source.PairIndex(i));
}
}
public static SequentialQuad <TResult> Select <TSource, TResult>(
this SequentialQuad <TSource> source,
Func <TSource, TResult> selector)
{
return(new SequentialQuad <TResult>(
selector(source.Value1),
selector(source.Value2),
selector(source.Value3),
selector(source.Value4)));
}
private static SequentialPair <TValue> PairIndex <TValue>(
this SequentialQuad <TValue> source,
int index)
{
if (index >= source.Count - 1)
{
throw new IndexOutOfRangeException();
}
return(new SequentialPair <TValue>(
source[index],
source[index + 1]));
}
public static SequentialTriple <SequentialPair <TValue> > Pairwise <TValue>(
this SequentialQuad <TValue> source,
int index)
{
if (index >= source.ValueArray.Count - 1)
{
throw new IndexOutOfRangeException();
}
throw new NotImplementedException();
//return new SequentialPair<TValue>(
// ValueArray[index],
// ValueArray[index + 1]);
}
//public static SequentialQuad<TResult> SelectWithLast<TSource, TResult>(
// this SequentialTriple<TSource> source,
// Func<TSource, TResult> selector,
// TResult seed)
//{
// TResult selectMethod(
// Func<TSource, TResult> _selector,
// TResult last,
// TResult current)
// {
// }
// return new SequentialQuad<TResult>(
// ,
// selector(source.Value2),
// selector(source.Value3));
//}
public static SequentialTriple <SequentialPair <TValue> > Pairwise <TValue>(
this SequentialQuad <TValue> source)
{
var pairWiseArray = source
.PairwiseEnumerable()
.ToArray();
if (pairWiseArray.Length != 3)
{
throw new IndexOutOfRangeException();
}
return(SequentialSetFactory.Build(
pairWiseArray[0],
pairWiseArray[1],
pairWiseArray[2]));
}