static void Main(string[] args)
{
// Task 01 - Print first names which statrs with Letter R
Func <Person, bool> firstNameStartsWithLetterR = x => x.FirstName.Contains("R");
Func <Person, int> orderAgeByDesc = x => x.Age;
var task1 = Database.people
.Where(firstNameStartsWithLetterR)
.OrderByDescending(orderAgeByDesc)
.ToList();
ListHelpers.PrintInfo(task1);
Console.WriteLine("------------------------------------------------------------\n");
// Task 02 - Find and print all brown dogs names and ages older than 3 years, ordered by Age - ASCENDING ORDER
Func <Dog, bool> printBrownDogs = x => x.Color == "Brown" && x.Age >= 3;
Func <Dog, int> orderByAgeAscending = x => x.Age;
var task2 = Database.dogs
.Where(printBrownDogs)
.OrderBy(orderByAgeAscending)
.ToList();
ListHelpers.PrintInfo(task2);
Console.WriteLine("------------------------------------------------------------\n");
// Task 03 - Find and print all persons with more than 2 dogs, ordered by Name - DESCENDING ORDER
Func <Person, bool> printPersonsWithMoreThanTwoDogs = x => x.Dogs.Count >= 2;
Func <Person, string> orderByFirstNameDescending = x => x.FirstName;
var task3 = Database.people
.Where(printPersonsWithMoreThanTwoDogs)
.OrderByDescending(orderByFirstNameDescending)
.ToList();
ListHelpers.PrintInfo(task3);
Console.WriteLine("------------------------------------------------------------\n");
// Task 04 - Find and print all Freddy`s dogs names older than 1 year
Func <Person, bool> findFreddy = x => x.FirstName == "Freddy";
Func <Person, IEnumerable <Dog> > selectFreddyDogs = x => x.Dogs;
Func <Dog, string> printFreddyDogsNames = x => x.Name;
Func <Dog, bool> printFreddyDogsOlderThanOneYear = x => x.Age > 1;
var task4 = Database.people
.Where(findFreddy)
.SelectMany(selectFreddyDogs)
.Where(printFreddyDogsOlderThanOneYear)
.ToList();
ListHelpers.PrintInfo(task4);
Console.WriteLine("------------------------------------------------------------\n");
// Task 05 - Find and print Nathen`s first dog
Func <Person, bool> findNathen = x => x.FirstName == "Nathen";
Func <Person, Dog> findNathenFirstDog = x => x.Dogs.FirstOrDefault();
var task5 = Database.people
.Where(findNathen)
.Select(findNathenFirstDog)
.ToList();
ListHelpers.PrintInfo(task5);
Console.WriteLine("------------------------------------------------------------\n");
// Task 06 - Find and print all white dogs names from Cristofer, Freddy, Erin and Amelia, ordered by Name - ASCENDING ORDER
var listOfNames = new List <string>()
{
"Cristofer", "Freddy", "Erin", "Amelia"
};
Func <Person, bool> selectNames = p => listOfNames.Contains(p.FirstName);
Func <Person, IEnumerable <Dog> > selectPersonDogs = p => p.Dogs;
Func <Dog, string> orderByDogName = d => d.Name;
Func <Dog, bool> checkDogColor = d => d.Color == "White";
var task6 = Database.people
.Where(selectNames)
.SelectMany(selectPersonDogs)
.OrderBy(orderByDogName)
.Where(checkDogColor)
.ToList();
ListHelpers.PrintInfo(task6);
// Trajan Way
//var listOfName = new List<string> { "Cristofer", "Freddy", "Erin", "Amelia" };
//var dogNames = Database.people
// .Where(x => listOfName.Contains(x.FirstName))
// .SelectMany(x => x.Dogs)
// .Where(x => x.Color == "White")
// .OrderBy(x => x.Name)
// .ToList();
//ListHelpers.PrintInfo(dogNames);
Console.ReadLine();
}