public Enumerator(Permutations <T> source)
{
_myParent = source;
_myLexicographicalOrders = new int[source._myLexicographicOrders.Length];
source._myLexicographicOrders.CopyTo(_myLexicographicalOrders, 0);
Reset();
}
private void Initialize(ICollection <T> values, int lowerIndex, GenerateOption type)
{
_myMetaCollectionType = type;
LowerIndex = lowerIndex;
_myValues = new List <T>();
_myValues.AddRange(values);
var myMap = new List <bool>();
switch (type)
{
case GenerateOption.WithoutRepetition:
{
myMap.AddRange(_myValues.Select((t, i) => i < _myValues.Count - LowerIndex));
break;
}
default:
{
for (var i = 0; i < values.Count - 1; ++i)
{
myMap.Add(true);
}
for (var i = 0; i < LowerIndex; ++i)
{
myMap.Add(false);
}
break;
}
}
_myPermutations = new Permutations <bool>(myMap);
}