1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4
5 namespace Linq101
6 {
7 class Quantifiers
8 {
9 /// <summary>
10 /// This sample uses Any to determine if any of the words in the array contain the substring 'ei'.
11 /// </summary>
12 public void Linq67()
13 {
14 string[] words = { "believe", "relief", "receipt", "field" };
15
16 bool iAfterE = words.Any(w => w.Contains("ei"));
17
18 Console.WriteLine("There is a word that contains in the list that contains 'ei': {0}", iAfterE);
19 }
20
21 /// <summary>
22 /// This sample uses Any to return a grouped a list of products only for categories that have at least one product that is out of stock.
23 /// </summary>
24 public void Linq68()
25 {
26 List<Data.Product> products = Data.GetProductList();
27 var productGroups = from p in products
28 group p by p.Category
29 into g
30 where g.Any(p => p.UnitsInStock == 0)
31 select new { Category = g.Key, Products = g };
32
33 ObjectDumper.Write(productGroups, 1);
34 }
35
36 /// <summary>
37 /// This sample uses All to determine whether an array contains only odd numbers.
38 /// </summary>
39 public void Linq69()
40 {
41 int[] numbers = { 1, 11, 3, 19, 41, 65, 19 };
42
43 bool onlyOdd = numbers.All(n => n % 2 == 1);
44
45 Console.WriteLine("The list contains only odd numbers : {0}", onlyOdd);
46 }
47
48 /// <summary>
49 /// This sample uses All to return a grouped a list of products only for categories that have all of their products in stock.
50 /// </summary>
51 public void Linq70()
52 {
53 List<Data.Product> products = Data.GetProductList();
54
55 var productGroups = from p in products
56 group p by p.Category
57 into g
58 where g.All(p => p.UnitsInStock > 0)
59 select new { Category = g.Key, products = g };
60
61 ObjectDumper.Write(productGroups, 1);
62 }
63 }
64 }
