Create Lambda to return Tuple - CSharp Language Basics

CSharp examples for Language Basics:Tuple

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Description

Create Lambda to return Tuple

Demo Code

using System;/* w  ww  .  j  av a 2  s  .  c  o  m*/
using System.Collections.Generic;
using System.Linq;
class MinMax4
{
   static void Main()
   {
      Random rng = new Random();
      var numbers = Enumerable.Range(0, 100).Select(_ => rng.Next(1000));
      var minMax = MinMax(numbers);
      Console.WriteLine($"Minimum: {minMax.min}");
      Console.WriteLine($"Maximum: {minMax.max}");
   }
   static (int min, int max) MinMax(IEnumerable<int> source) =>
   source.Aggregate(first => (first, first),((int min, int max) result, int next) => (Math.Min(result.min, next), Math.Max(result.max, next)));
}
public static class MoreEnumerables
{
   public static TAccumulate Aggregate<TSource, TAccumulate>(
   this IEnumerable<TSource> source,
   Func<TSource, TAccumulate> seedSelector,
   Func<TAccumulate, TSource, TAccumulate> func)
   {
      using (var iterator = source.GetEnumerator())
      {
         if (!iterator.MoveNext())
         {
            throw new InvalidOperationException("Empty sequence");
         }
         var accumulator = seedSelector(iterator.Current);
         while (iterator.MoveNext())
         {
            accumulator = func(accumulator, iterator.Current);
         }
         return accumulator;
      }
   }
}

Result


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