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Category: Programming
Level: Beginner to seasoned
900 pages
ISBN-10 097661322-0
ISBN-13 978-097661322-0
$59.99 USA
$79.99 CANADA


Listing 15-23 extracted from chapter Collections


Listing 15-22<     > Listing 15-24


This listing can be compiled with the command line:
csc.exe /target:exe Example_15_23.cs
Errors: 0 Warnings: 0


Example_15_23.cs
using System.Collections.Generic;
class Program {
   class Article {
      public Article(decimal price,string name){Price=price;Name=name;}
      public readonly decimal Price;
      public readonly string  Name;
   }
   static void Main(){
      // Seek out every odd integers.
      // Implicitly uses a 'Predicate<T>' delegate object.
      List<int> integers = new List<int>();
      for(int i=1; i<=10; i++) 
         integers.Add(i);
      List<int> even =integers.FindAll( delegate(int i){ return i%2==0; });

      // Sum up items of the list.
      // Implicitly uses an 'Action<T>' delegate object.
      int sum = 0;
      integers.ForEach(delegate(int i) { sum += i; });

      // Sort items of type 'Article'.
      // Implicitly uses a 'Comparison<T>' delegate object.
      List<Article> articles = new List<Article>();
      articles.Add( new Article(5,"Shoes") );
      articles.Add( new Article(3,"Shirt") );
      articles.Sort(delegate(Article x, Article y) {
         return Comparer<decimal>.Default.Compare(x.Price,y.Price); } );

      // Cast items of type 'Article' into 'decimal'.
      // Implicitly uses a 'Converter<T,U>' delegate object.
      List<decimal> artPrice = articles.ConvertAll<decimal> (
         delegate(Article article) { return (decimal)article.Price; } );
   }
}	
Copyright Patrick Smacchia 2006 2007