public static T Accumulate <T>(IEnumerable <T> enumerable, T initialValue, Functional.BinaryFunction <T, T, T> func)
{
T result = initialValue;
foreach (T t in enumerable)
{
result = func(result, t);
}
return(result);
}
[Test] public void Not_Function()
{
Functional.UnaryFunction <int, bool> func1 = Functional.Not1(Functional.Bind1st <int, bool>(Functional.LessThan <int>, 29));
Assert.IsTrue(func1(12)); // !(29 < 12) == false;
Assert.IsFalse(func1(30)); // !(29 < 30) == true;
Assert.IsTrue(func1(29)); // !(29 < 29) == false;
Functional.BinaryFunction <int, int, bool> func2 = Functional.Not2 <int, int>(Functional.LessThan <int>);
Assert.IsFalse(func2(12, 29)); // !(29 < 12) == false;
Assert.IsTrue(func2(30, 29)); // !(29 < 30) == true;
Assert.IsTrue(func2(29, 29)); // !(29 < 29) == false;
}
public static OutputIterator <O> Transform <I, O>(InputIterator <I> begin1, InputIterator <I> end1, InputIterator <I> begin2,
OutputIterator <O> dest, Functional.BinaryFunction <I, I, O> func)
{
begin1 = IteratorUtil.Clone(begin1);
begin2 = IteratorUtil.Clone(begin2);
dest = IteratorUtil.Clone(dest);
for (; !begin1.Equals(end1); begin1.MoveNext(), begin2.MoveNext(), dest.MoveNext())
{
dest.Write(func(begin1.Read(), begin2.Read()));
}
return(dest);
}
public static T Accumulate <T>(InputIterator <T> begin, InputIterator <T> end, T initialValue, Functional.BinaryFunction <T, T, T> func)
{
T result = initialValue;
for (begin = IteratorUtil.Clone(begin); !begin.Equals(end); begin.MoveNext())
{
result = func(result, begin.Read());
}
return(result);
}
