MoreEnumerable.Assert<TSource> Method (IEnumerable<TSource>, Func<TSource, Boolean>) |
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
Syntaxpublic static IEnumerable<TSource> Assert<TSource>(
this IEnumerable<TSource> source,
Func<TSource, bool> predicate
)
<ExtensionAttribute>
Public Shared Function Assert(Of TSource) (
source As IEnumerable(Of TSource),
predicate As Func(Of TSource, Boolean)
) As IEnumerable(Of TSource)
public:
[ExtensionAttribute]
generic<typename TSource>
static IEnumerable<TSource>^ Assert(
IEnumerable<TSource>^ source,
Func<TSource, bool>^ predicate
)
[<ExtensionAttribute>]
static member Assert :
source : IEnumerable<'TSource> *
predicate : Func<'TSource, bool> -> IEnumerable<'TSource>
Parameters
- source
- Type: System.Collections.Generic.IEnumerable<TSource>
Source sequence. - predicate
- Type: System.Func<TSource, Boolean>
Function that asserts an element of the source sequence for a condition.
Type Parameters
- TSource
- Type of elements in source sequence.
Return Value
Type:
IEnumerable<TSource>
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
IEnumerable<TSource>. 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).
ExceptionsException | Condition |
---|
InvalidOperationException | The input sequence
contains an element that does not meet the condition being
asserted. |
Remarks
This operator uses deferred execution and streams its results.
See Also