MoreEnumerable.FallbackIfEmpty<T> Method (IEnumerable<T>,T[]) |
Returns the elements of a sequence, but if it is empty then
returns an altenate sequence from an array of values.
Namespace:
MoreLinq
Assembly:
MoreLinq (in MoreLinq.dll) Version: 2.8.0
Syntax public static IEnumerable<T> FallbackIfEmpty<T>(
this IEnumerable<T> source,
params T[] fallback
)
<ExtensionAttribute>
Public Shared Function FallbackIfEmpty(Of T) (
source As IEnumerable(Of T),
ParamArray fallback As T()
) As IEnumerable(Of T)
public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ FallbackIfEmpty(
IEnumerable<T>^ source,
... array<T>^ fallback
)
[<ExtensionAttribute>]
static member FallbackIfEmpty :
source : IEnumerable<'T> *
fallback : 'T[] -> IEnumerable<'T>
Parameters
- source
- Type: System.Collections.Generic.IEnumerable<T>
The source sequence. - fallback
- Type:T[]
The array that is returned as the alternate
sequence if source is empty.
Type Parameters
- T
- The type of the elements in the sequences.
Return Value
Type:
IEnumerable<T>
An
IEnumerable< T> that containing fallback values
if
source is empty; otherwise,
source.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IEnumerable<T>. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
See Also