public void SimpleReturn()
{
var array = new[] { 1, 2, 3, 4 };
Assert.Equal(new[] { 1, -1, 2, -2, 3, -3, 4, -4 }, array.FlatMap(e => new[] { e, -e }).ToArray());
}
public void EnumerablePlus()
{
var array = new[] { new[] { 1, 2 }, new[] { 3, 4 } };
//throw new Exception(Newtonsoft.Json.JsonConvert.SerializeObject(result));
Assert.Equal(new[] { 1, 2, 100, 3, 4, 100 }, array.FlatMap<int>(e => new[] { e, 100 }).ToArray());
}