using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;
public class MainClass{
public static void Main(){
object[] doubles = {1.0, 2.0, 3.0};
IEnumerable<double> d = doubles.Cast<double>();
Console.Write(d);
}
}
Author: coder
The standard object creation and initialization vs Linq
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Reflection;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
class Person {
int _id;
int _idRole;
string _lastName;
string _firstName;
public int ID {
get { return _id; }
set { _id = value; }
}
public int IDRole {
get { return _idRole; }
set { _idRole = value; }
}
public string LastName {
get { return _lastName; }
set { _lastName = value; }
}
public string FirstName {
get { return _firstName; }
set { _firstName = value; }
}
}
class Program {
static void Main(string[] args) {
Person p1 = new Person();
p1.FirstName = "B";
p1.LastName = "A";
Person p2 = new Person { FirstName = "Tom", LastName = "Gray" };
}
}
Average with int array
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
public static void Main() {
IEnumerable<int> intSequence = Enumerable.Range(1, 10);
foreach (int i in intSequence)
Console.WriteLine(i);
double average = intSequence.Average();
Console.WriteLine("Here is the average: {0}", average);
}
}
uses Average to get the average of all values of an integer array.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
public class MainClass {
public static void Main() {
int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
double averageNum = numbers.Average();
Console.WriteLine("The average number is {0}.", averageNum);
}
}
Contains, Any return a bool value
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
}
}
Any with false predicate
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);
}
}
Any with string operator
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);
}
}