IEnumerable Extension Methods on an Enum
I have an enum(below) that I want to be able to use a LINQ extension meth开发者_高级运维od on.
enum Suit{
Hearts = 0,
Diamonds = 1,
Clubs = 2,
Spades = 3
}
Enum.GetValues(...) is of return type System.Array, but I can't seem to get access to a ToList() extension or anything else of that sort.
I'm just looking to write something like...
foreach(Suit s in Enum.GetValues(typeof(Suit)).Select(x=>x).Where(x=> x != param)){}
Is there something I'm missing, or can someone explain to me why this isn't possible?
Thanks.
Enum.GetValues
returns a System.Array
and System.Array
only implements IEnumerable
rather than IEnumerable<T>
so you will need to use the Enumerable.OfType
extension method to convert the IEnumerable
to IEnumerable<Suit>
like this:
Enum.GetValues(typeof(Suit))
.OfType<Suit>()
.Where(x => x != param);
Edit: I removed the call to IEnumerable.Select
as it was a superfluous projection without any meaningful translation. You can freely filter the IEnumerable<Suit>
that is returned from OfType<T>
.
Array implements IEnumerable so you'll need to use Cast<Suit>
or OfType<Suit>
to get the IEnumerble<T>
extensions like ToList();
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