EnumerableExtensionsSumTSource(IEnumerableTSource, FuncTSource, NullableBinarySize) Method

Computes the sum of a sequence of nullable BinarySize values that are obtained by invoking a transform function on each element of the input sequence..

Definition

Namespace: Ookii
Assembly: Ookii.BinarySize (in Ookii.BinarySize.dll) Version: 1.2.0+20f0bdf981c7baf115c68ccab612b1a031efcb4d

C#

public static BinarySize? Sum<TSource>(
	this IEnumerable<TSource> source,
	Func<TSource, BinarySize?> selector
)

VB

<ExtensionAttribute>
Public Shared Function Sum(Of TSource) ( 
	source As IEnumerable(Of TSource),
	selector As Func(Of TSource, BinarySize?)
) As BinarySize?

C++

public:
[ExtensionAttribute]
generic<typename TSource>
static Nullable<BinarySize> Sum(
	IEnumerable<TSource>^ source, 
	Func<TSource, Nullable<BinarySize>>^ selector
)

F#

[<ExtensionAttribute>]
static member Sum : 
        source : IEnumerable<'TSource> * 
        selector : Func<'TSource, Nullable<BinarySize>> -> Nullable<BinarySize>

Parameters

source IEnumerableTSource: A sequence of values to calculate the sum of.
selector FuncTSource, NullableBinarySize: A transform function to apply to each element.

Type Parameters

TSource: The type of the elements of source.

Return Value

NullableBinarySize
The sum of the values in the 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

Items in source that are are excluded from the computation of the sum. This method returns zero if source contains no elements or all elements are .

Exceptions

ArgumentNullException	source or selector is .
OverflowException	The sum is larger than BinarySizeMaxValue.