XEnumerableLastIndexOfTSource Method (IEnumerableTSource, TSource, IEqualityComparerTSource) |
Returns the position of the last occurrence of item in the source sequence, or -1 if it is not found.
Namespace:
Linq.Extras
Assembly:
Linq.Extras (in Linq.Extras.dll) Version: 5.0.0+96a4f4bfed64095342c5df107c1fe1fb95603ee5
Syntaxpublic static int LastIndexOf<TSource>(
this IEnumerable<TSource> source,
TSource item,
IEqualityComparer<TSource>? comparer = null
)
<ExtensionAttribute>
Public Shared Function LastIndexOf(Of TSource) (
source As IEnumerable(Of TSource),
item As TSource,
Optional comparer As IEqualityComparer(Of TSource) = Nothing
) As Integer
[<ExtensionAttribute>]
static member LastIndexOf :
source : IEnumerable<'TSource> *
item : 'TSource *
?comparer : IEqualityComparer<'TSource>
(* Defaults:
let _comparer = defaultArg comparer null
*)
-> int
Parameters
- source
- Type: System.Collections.GenericIEnumerableTSource
The sequence to search for item. - item
- Type: TSource
The element to find the index of. - comparer (Optional)
- Type: System.Collections.GenericIEqualityComparerTSource
The comparer to use to test for equality between elements.
Type Parameters
- TSource
- The type of the elements of source.
Return Value
Type:
Int32The zero-based index of the last occurrence of
item if it is found; otherwise, -1.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IEnumerableTSource. 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