Question

I have an IEnumerable<Point> and I want to convert it to an IEnumerable<float>.

Can I do this in a single Linq statement?

IEnumerable<float> ConvertToPoints(IEnumerable<Point> points)
{
    List<float> floats = new List<float>();
    foreach(var point in points)
    {
        floats.Add(point.X);
        floats.Add(point.Y);
    }
    return floats;
}

Answer 1

Yes, you can use SelectMany:

return points.SelectMany(point => new float[] { point.X, point.Y });

Another way that doesn’t require LINQ is to use an iterator block:

IEnumerable<float> getPoints(IEnumerable<Point> points)
{
    foreach (Point point in points)
    {
        yield return point.X;
        yield return point.Y;
    }
}