MoreEnumerableAssertTSource Method (IEnumerableTSource, FuncTSource, Boolean, FuncTSource, Exception) |
Asserts that all elements of a sequence meet a given condition
otherwise throws an
Exception object.
Namespace:
MoreLinq
Assembly:
MoreLinq (in MoreLinq.dll) Version: 2.4.0
Syntax public static IEnumerable<TSource> Assert<TSource>(
this IEnumerable<TSource> source,
Func<TSource, bool> predicate,
Func<TSource, Exception> errorSelector
)
<ExtensionAttribute>
Public Shared Function Assert(Of TSource) (
source As IEnumerable(Of TSource),
predicate As Func(Of TSource, Boolean),
errorSelector As Func(Of TSource, Exception)
) As IEnumerable(Of TSource)
public:
[ExtensionAttribute]
generic<typename TSource>
static IEnumerable<TSource>^ Assert(
IEnumerable<TSource>^ source,
Func<TSource, bool>^ predicate,
Func<TSource, Exception^>^ errorSelector
)
[<ExtensionAttribute>]
static member Assert :
source : IEnumerable<'TSource> *
predicate : Func<'TSource, bool> *
errorSelector : Func<'TSource, Exception> -> IEnumerable<'TSource>
Parameters
- source
- Type: System.Collections.GenericIEnumerableTSource
Source sequence. - predicate
- Type: SystemFuncTSource, Boolean
Function that asserts an element of the input sequence for a condition. - errorSelector
- Type: SystemFuncTSource, Exception
Function that returns the Exception object to throw.
Type Parameters
- TSource
- Type of elements in source sequence.
Return Value
Type:
IEnumerableTSource
Returns the original sequence.
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).
Remarks
This operator uses deferred execution and streams its results.
See Also