LINQ

Max on object list

Posted on by coder 
   
 

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class Employee {
    public int birthYear;
    public string firstName;
    public string lastName;

    public static Employee[] GetEmployees() {
        Employee[] actors = new Employee[] {
        new Employee { birthYear = 1964, firstName = "K", lastName = "R" },
        new Employee { birthYear = 1968, firstName = "O", lastName = "W" },
        new Employee { birthYear = 1960, firstName = "J", lastName = "S" },
        new Employee { birthYear = 1964, firstName = "S", lastName = "B" },
      };
        return (actors);
    }
}
public class MainClass {
    public static void Main() {
        int youngestEmployeeAge = Employee.GetEmployees().Max(a => a.birthYear);
        Console.WriteLine(youngestEmployeeAge);
    }
}

Max on String array

Posted on by coder 
   
 
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"G", "H", "H", "H", "H", "J"};
        string maxName = presidents.Max();
        Console.WriteLine(maxName);
    }
}

Max on int array

Posted on by coder 
   
 

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        int[] myInts = new int[] { 974, 2, 7, 1374, 27, 54 };
        int maxInt = myInts.Max();
        Console.WriteLine(maxInt);
    }
}

LongCount with &&(and) operator

Posted on by coder

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
public static void Main() {
long count = Enumerable.Range(0, int.MaxValue).
Concat(Enumerable.Range(0, int.MaxValue)).LongCount(n => n > 1 && n < 4); Console.WriteLine(count); } } [/csharp]

LongCount Prototype

Posted on by coder 
   
 

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        long count = Enumerable.Range(0, int.MaxValue).Concat(Enumerable.Range(0, int.MaxValue)).LongCount();
        Console.WriteLine(count);
    }
}

LastOrDefault with string operator

Posted on by coder 
   
 

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"};

        string name = presidents.LastOrDefault(p => p.StartsWith("Z"));
        Console.WriteLine(name == null ? "NULL" : name);

    }
}