FallbackIfEmptyExtensionFallbackIfEmptyT(IEnumerableT, T, T, T, T) Method

Returns the elements of a sequence, but if it is empty then returns an alternate sequence of values.

Definition

Namespace: MoreLinq.Extensions
Assembly: MoreLinq (in MoreLinq.dll) Version: 4.4.0+6d97c3b1d482f98300f4446df14742b0e3fafbec

C#

public static IEnumerable<T> FallbackIfEmpty<T>(
	this IEnumerable<T> source,
	T fallback1,
	T fallback2,
	T fallback3,
	T fallback4
)

VB

<ExtensionAttribute>
Public Shared Function FallbackIfEmpty(Of T) ( 
	source As IEnumerable(Of T),
	fallback1 As T,
	fallback2 As T,
	fallback3 As T,
	fallback4 As T
) As IEnumerable(Of T)

C++

public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ FallbackIfEmpty(
	IEnumerable<T>^ source, 
	T fallback1, 
	T fallback2, 
	T fallback3, 
	T fallback4
)

F#

[<ExtensionAttribute>]
static member FallbackIfEmpty : 
        source : IEnumerable<'T> * 
        fallback1 : 'T * 
        fallback2 : 'T * 
        fallback3 : 'T * 
        fallback4 : 'T -> IEnumerable<'T>

Parameters

source IEnumerableT: The source sequence.
fallback1 T: First value of the alternate sequence that is returned if source is empty.
fallback2 T: Second value of the alternate sequence that is returned if source is empty.
fallback3 T: Third value of the alternate sequence that is returned if source is empty.
fallback4 T: Fourth value of the alternate sequence that is returned if source is empty.

Type Parameters

T: The type of the elements in the sequences.

Return Value

IEnumerableT
An IEnumerableT 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 IEnumerableT. 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).