public void FoldRight3()
{
var xs = new[]
{
new[] {1, 2, 3}.AsEnumerable(),
new[] {4, 5, 6}.AsEnumerable(),
new[] {7, 8, 9}.AsEnumerable()
}.AsEnumerable();
var actual = xs.FoldRight(Enumerable.Empty<int>(), Enumerable.Concat);
Assert.That(actual, Is.EqualTo(new[] {1,2,3,4,5,6,7,8,9}));
}
public void FoldRight2()
{
var xs = new[] {"A", "B", "C"};
var actual = xs.FoldRight("", (a, b) => a + b);
Assert.That(actual, Is.EqualTo("ABC"));
}
public void FoldRight1()
{
var xs = new[] {1,2,3};
var actual = xs.FoldRight(0, (a, b) => a + b);
Assert.That(actual, Is.EqualTo(6));
}