AggregateRightExtension.AggregateRight<TSource, TAccumulate, TResult>(IEnumerable<TSource>, TAccumulate, Func<TSource, TAccumulate, TAccumulate>, Func<TAccumulate, TResult>) Method

Applies a right-associative accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. This operator is the right-associative version of the Aggregate<TSource, TAccumulate, TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate, TSource, TAccumulate>, Func<TAccumulate, TResult>) LINQ operator.

Definition

Namespace: MoreLinq.Extensions
Assembly: MoreLinq (in MoreLinq.dll) Version: 3.4.0+b99a6a8cc504caf2d48372fe54a2f8116c59cd0c

C#
public static TResult AggregateRight<TSource, TAccumulate, TResult>(
	this IEnumerable<TSource> source,
	TAccumulate seed,
	Func<TSource, TAccumulate, TAccumulate> func,
	Func<TAccumulate, TResult> resultSelector
)

VB
<ExtensionAttribute>
Public Shared Function AggregateRight(Of TSource, TAccumulate, TResult) ( 
	source As IEnumerable(Of TSource),
	seed As TAccumulate,
	func As Func(Of TSource, TAccumulate, TAccumulate),
	resultSelector As Func(Of TAccumulate, TResult)
) As TResult

C++
public:
[ExtensionAttribute]
generic<typename TSource, typename TAccumulate, typename TResult>
static TResult AggregateRight(
	IEnumerable<TSource>^ source, 
	TAccumulate seed, 
	Func<TSource, TAccumulate, TAccumulate>^ func, 
	Func<TAccumulate, TResult>^ resultSelector
)

F#
[<ExtensionAttribute>]
static member AggregateRight : 
        source : IEnumerable<'TSource> * 
        seed : 'TAccumulate * 
        func : Func<'TSource, 'TAccumulate, 'TAccumulate> * 
        resultSelector : Func<'TAccumulate, 'TResult> -> 'TResult 

Parameters

source IEnumerable<TSource>: Source sequence.
seed TAccumulate: The initial accumulator value.
func Func<TSource, TAccumulate, TAccumulate>: A right-associative accumulator function to be invoked on each element.
resultSelector Func<TAccumulate, TResult>: A function to transform the final accumulator value into the result value.

Type Parameters

TSource: The type of the elements of source.
TAccumulate: The type of the accumulator value.
TResult: The type of the resulting value.

Return Value

TResult
The transformed final accumulator value.

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).

Remarks

This operator executes immediately.

Example

C#
var numbers = Enumerable.Range(1, 5);
int result = numbers.AggregateRight("6", (a, b) => $"({a}/{b})", str => str.Length);

The result variable will contain 21.