Aggregation
Aggregate, Average, Count, LongCount, Max, Min, Sum
Conversion
AsEnumerable, Cast, OfType, ToArray, ToDictionary, ToList, ToLookup
Element
ElementAt, ElementAtOrDefault, First, FirstOrDefault, Last, LastOrDefault, Single, SingleOrDefault
ElementAt
ElementAtOrDefault
First (simple)
First (conditional)
FirstOrDefault
Last
LastOrDefault (simple)
LastOrDefault (conditional)
Single
SingleOrDefault
Generation
DefaultIfEmpty, Empty, Range, Repeat
Grouping
GroupBy
Join
GroupJoin, Join
Ordering
OrderBy, OrderByDescending, Reverse, ThenBy, ThenByDescending
OrderBy (simple - numbers)
OrderBy (simple - dates)
OrderBy (simple - objects)
OrderByDescending
Reverse
ThenBy
ThenByDescending
Other
Concat, SequenceEqual, Zip
Partitioning
Skip, SkipWhile, Take, TakeWhile
Projection
Select, SelectMany
Quantifiers
All, Any, Contains
Restriction
Where
Set
Distinct, Except, Intersect, Union
Close
Aggregate: Performs a specified operation to each element in a collection, while carrying the result forward. Seed sets initial value.
Aggregate: Performs a specified operation to each element in a collection, while carrying the result forward. Seed sets initial value. |
Aggregate: Performs a specified operation to each element in a collection, while carrying the result forward. Seed sets initial value. |
This Lambda Expression sample aggregates numbers in array by addition, using a seed (seed is an initial value). |
This Lambda Expression sample aggregates numbers in array by addition, using a seed (seed is an initial value). |
// A Query Expression cannot be constructed for Aggregate() in C#. // Consider using a Lambda Expression instead.
' A Query Expression cannot be constructed for Aggregate() in VB.NET. ' Consider using a Lambda Expression instead.
// A Query Expression cannot be constructed for Aggregate() in F#. // Consider using a Lambda Expression instead.
private static void Sample_Aggregate_Lambda_Seed() { var numbers = new int[] { 1, 2, 3 }; var result = numbers.Aggregate(10, (a, b) => a + b); Debug.WriteLine("Aggregated numbers by addition with a seed of 10:"); Debug.WriteLine(result); }Output:
Aggregated numbers by addition with a seed of 10: 16
Private Shared Sub Sample_Aggregate_Lambda_Seed() Dim numbers = New Integer() {1, 2, 3} Dim result = numbers.Aggregate(10, Function(a, b) a + b) Debug.WriteLine("Aggregated numbers by addition with a seed of 10:") Debug.WriteLine(result) End SubOutput:
Aggregated numbers by addition with a seed of 10: 16
let Sample_Aggregate_Lambda_Seed() = let numbers = [|1; 2; 3|] let result = numbers.Aggregate(10, fun a b -> a + b) Debug.WriteLine(sprintf "Aggregated numbers by addition with a seed of 10:") Debug.WriteLine(sprintf "%d" result)Output:
Aggregated numbers by addition with a seed of 10: 16