Csharp/CSharp Tutorial/LINQ/Any
Содержание
Any method
<source lang="csharp">using System; using System.Collections.Generic; using System.Linq; using System.Text;
class Customer
{
public string ID { get; set; }
public string City { get; set; }
public string Country { get; set; }
public string Region { get; set; }
public decimal Sales { get; set; }
}
class Program
{
static void Main(string[] args)
{
List<Customer> customers = new List<Customer> {
new Customer { ID="P", City="Tehran", Country="Iran", Region="Asia", Sales=7000 },
new Customer { ID="Q", City="London", Country="UK", Region="Europe", Sales=8000 },
new Customer { ID="R", City="Beijing", Country="China", Region="Asia", Sales=9000 },
new Customer { ID="T", City="Lima", Country="Peru", Region="South America", Sales=2002 }
};
bool anyUSA = customers.Any(c => c.Country == "USA");
Console.WriteLine(anyUSA);
}
}</source>
Any operator with an string array
<source lang="csharp">using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {
public static void Main() {
string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
bool any = presidents.Any();
Console.WriteLine(any);
}
}</source>
Any with condition
<source lang="csharp">using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Linq; public class MainClass{
public static void Main(){
int[] numbers = { 2, 6, 1, 5, 10 };
Console.WriteLine("Is there at least one odd number?");
Console.Write(numbers.Any(e => e % 2 == 1) ? "Yes, there is" : "No, there isn"t");
}
}</source>
Any with false predicate
<source lang="csharp">using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {
public static void Main() {
string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
bool any = presidents.Any(s => s.StartsWith("A"));
Console.WriteLine(any);
}
}</source>
Any with string operator
<source lang="csharp">using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {
public static void Main() {
string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
bool any = presidents.Any(s => s.StartsWith("Z"));
Console.WriteLine(any);
}
}</source>
Contains, Any return a bool value
<source lang="csharp">using System; using System.Collections.Generic; using System.Linq; public class MainClass {
public static void Main() {
int[] numbers = { 10, 9, 8, 7, 6 };
bool hasTheNumberNine = numbers.Contains(9); // true
bool hasMoreThanZeroElements = numbers.Any(); // true
bool hasAnOddElement = numbers.Any(n => n % 2 == 1); // true
}
}</source>
Use Quantifiers: Any
<source lang="csharp">using System; using System.Collections.Generic; using System.Linq; using System.Text; public class MainClass {
public static void Main() {
string[] words = { "bei", "rie", "rei", "field" };
bool iAfterE = words.Any(w => w.Contains("ei"));
Console.WriteLine("There is a word that contains in the list that contains "ei": {0}", iAfterE);
}
}</source>
