M_CodeJam_Collections_EnumerableExtensions_FirstOrDefault__1

EnumerableExtensions.FirstOrDefault(T) Method (IEnumerable(T), T)

Returns first element, or specified defaultValue, if sequence is empty.

Namespace: CodeJam.Collections
Assembly: CodeJam (in CodeJam.dll) Version: 2.1.0.0

Syntax

C#

public static T FirstOrDefault<T>(
	this IEnumerable<T> source,
	T defaultValue
)

VB

<ExtensionAttribute>
Public Shared Function FirstOrDefault(Of T) ( 
	source As IEnumerable(Of T),
	defaultValue As T
) As T

F#

[<ExtensionAttribute>]
static member FirstOrDefault : 
        source : IEnumerable<'T> * 
        defaultValue : 'T -> 'T 

Parameters

 

source

Type: System.Collections.Generic.IEnumerable(T)
An IEnumerable(T) to return an element from.

defaultValue

Type: T
Default value.

Type Parameters

 

T

The type of the elements of source.

Return Value

Type: T
default(T) if source is empty; otherwise, the first element in source.

Usage Note

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

Reference

EnumerableExtensions Class
FirstOrDefault Overload
CodeJam.Collections Namespace