CollectionExtensionsIndexOfT Method

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

Definition

Namespace: Gemstone.Collections.CollectionExtensions
Assembly: Gemstone.Common (in Gemstone.Common.dll) Version: 1.0.181 -- Release Build+97279656b5a55675063a4190481e67c4f9809501

C#View Source Request Example

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

VBView Source Request Example

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

C++View Source Request Example

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

JavaScriptView Source Request Example

JavaScript does not support generic types or methods.

Parameters

source IListT: A IListT to find an index in.
predicate FuncT, Boolean: A function to test each element for a condition.

Type Parameters

T: Type of elements of source.

Return Value

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

Usage Note

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).