C# Enumerable Aggregate(IEnumerable, Func)

Description

Enumerable Aggregate (IEnumerable, Func)Applies an accumulator function over a sequence.

Syntax

Enumerable.Aggregate(IEnumerable, Func) has the following syntax.

public static TSource Aggregate<TSource>(
  this IEnumerable<TSource> source,
  Func<TSource, TSource, TSource> func
)

Parameters

Enumerable.Aggregate(IEnumerable, Func) has the following parameters.

• TSource - The type of the elements of source.
• source - An IEnumerable to aggregate over.
• func - An accumulator function to be invoked on each element.

Returns

Enumerable.Aggregate(IEnumerable, Func) method returns TSource

Example

The following code example demonstrates how to reverse the order of words in a string by using Aggregate.

//from  w ww .  java2 s .  c o  m

using System;
using System.Linq;
using System.Collections.Generic;
public class MainClass{
  public static void Main(String[] argv){  
    string sentence = "this is a test";
    string[] words = sentence.Split(' ');
    string reversed = words.Aggregate((workingSentence, next) =>
                                       next + " " + workingSentence);
    Console.WriteLine(reversed);

  }
}
    
    

The code above generates the following result.