CollectionExtensionsIndexOfT Method

Returns the index of the first element of the sequence that satisfies a condition or -1 if no such element is found.

Namespace: GSF.Collections
Assembly: GSF.Core (in GSF.Core.dll) Version: 2.4.300-beta+b2186e2cd1f968c931b0e151fdd7c839f3d1e9cf

Syntax

public static int IndexOf<T>(
	this IList<T> source,
	Func<T, bool> predicate
)

<ExtensionAttribute>
Public Shared Function IndexOf(Of T) ( 
	source As IList(Of T),
	predicate As Func(Of T, Boolean)
) As Integer

public:
[ExtensionAttribute]
generic<typename T>
static int IndexOf(
	IList<T>^ source, 
	Func<T, bool>^ predicate
)

[<ExtensionAttribute>]
static member IndexOf : 
        source : IList<'T> * 
        predicate : Func<'T, bool> -> int

JavaScript does not support generic types or methods.

Int32
Index of the first element in source that matches the specified predicate; otherwise, -1.

In Visual Basic and C#, you can call this method as an instance method on any object of type IListT. 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).