static void Main(string[] args)
{
var books = new MyCollection <Book>();
var numbers = new List <int>()
{
1, 2, 3, 4, 5, 6
};
numbers.LazyFilter(n => n % 2 == 0);
MyUtilities.LazyFilter(numbers, n => n % 2 == 0);
books.Add(new Book {
Id = 1, Title = "C#", Cost = 10, Units = 12, Category = "Technology"
});
books.Add(new Book {
Id = 9, Title = "F#", Cost = 20, Units = 20, Category = "Fiction"
});
books.Add(new Book {
Id = 5, Title = "D#", Cost = 22, Units = 22, Category = "Technology"
});
books.Add(new Book {
Id = 3, Title = "E#", Cost = 78, Units = 52, Category = "Fiction"
});
books.Add(new Book {
Id = 2, Title = "K#", Cost = 60, Units = 32, Category = "Technology"
});
books.Add(new Book {
Id = 7, Title = "J#", Cost = 50, Units = 62, Category = "Fiction"
});
Console.WriteLine("Default List");
Console.WriteLine("{0}\t{1}\t{2}\t{3}", "Id", "Title", "Cost", "Units");
for (var i = 0; i < books.Count; i++)
{
Console.WriteLine(books.Get(i));
}
Console.WriteLine();
Console.WriteLine("Sorted (Id) List");
Console.WriteLine("{0}\t{1}\t{2}\t{3}", "Id", "Title", "Cost", "Units");
books.Sort((l, r) => Math.Sign(l.Id - r.Id));
for (var i = 0; i < books.Count; i++)
{
Console.WriteLine(books.Get(i));
}
Console.WriteLine();
Console.WriteLine("Sorted (Cost) List");
Console.WriteLine("{0}\t{1}\t{2}\t{3}", "Id", "Title", "Cost", "Units");
books.Sort(new BookComparerByCost());
foreach (var book in books)
{
Console.WriteLine(book);
}
Console.WriteLine();
Console.WriteLine("Sorted (Units) List using delegates");
Console.WriteLine("{0}\t{1}\t{2}\t{3}", "Id", "Title", "Cost", "Units");
//books.Sort(new CompareBookDelegate(CompareBooksByUnits));
//books.Sort(CompareBooksByUnits);
/*books.Sort(delegate (Book left, Book right)
* {
* if (left.Units > right.Units) return 1;
* if (left.Units == right.Units) return 0;
* return -1;
* }
* );*/
/*books.Sort((left,right) =>
* {
* return Math.Sign(left.Units - right.Units);
* }
* );*/
books.Sort((left, right) => Math.Sign(left.Units - right.Units));
for (var i = 0; i < books.Count; i++)
{
Console.WriteLine(books.Get(i));
}
Console.WriteLine();
/*var totalUnits = books.Sum(delegate(Book book)
* {
* return book.Units;
* });*/
var totalUnits = books.Sum(book => book.Units);
Console.WriteLine("Sum of Units = {0}", totalUnits);
var overStockedCount = books.CountFor(book => book.Units > 50);
Console.WriteLine("Number of books that are over stocked (Units > 50) = {0}", overStockedCount);
Console.WriteLine("Number of cheap books (Cost < 50) = {0}", books.CountFor(b => b.Cost < 50));
Console.WriteLine("The below are the cheap books");
var cheapBooks = books.Filter(b => b.Cost < 50);
foreach (var cheapBook in cheapBooks)
{
Console.WriteLine(cheapBook);
}
Console.WriteLine();
Console.WriteLine("Using Lazy Evaluation");
var cheapBooks2 = books.LazyFilter(b => b.Cost < 50);
foreach (var book in cheapBooks2)
{
Console.WriteLine(book);
}
Console.WriteLine("Are all the books cheap books ? {0}", books.All(b => b.Cost < 50));
Console.WriteLine("Is there any C# book at all ? {0}", books.Any(b => b.Title == "C#"));
Console.ReadLine();
}
