public void Sort(ProductComparerDelegate comparerDelegate)
{
for (var i = 0; i < Count - 1; i++)
{
for (var j = i + 1; j < Count; j++)
{
var leftProduct = (Product)list[i];
var rightProduct = (Product)list[j];
if (comparerDelegate(leftProduct, rightProduct) > 0)
{
var temp = leftProduct;
list[i] = list[j];
list[j] = temp;
}
}
}
}
static void Main(string[] args)
{
var products = new Products();
products.Add(new Product {
Id = 5, Name = "Pen", UnitCost = 10, Units = 50, Category = "Stationary"
});
products.Add(new Product {
Id = 7, Name = "Pencil", UnitCost = 5, Units = 5, Category = "Stationary"
});
products.Add(new Product {
Id = 3, Name = "Marker", UnitCost = 50, Units = 15, Category = "Stationary"
});
products.Add(new Product {
Id = 2, Name = "Grapes", UnitCost = 70, Units = 25, Category = "Grocery"
});
products.Add(new Product {
Id = 4, Name = "Pan", UnitCost = 100, Units = 10, Category = "Utencil"
});
products.Add(new Product {
Id = 1, Name = "Stove", UnitCost = 150, Units = 5, Category = "Utencil"
});
Console.WriteLine("Initial list");
Print(products);
Console.WriteLine("Sorting Products By Id");
products.SortById();
Print(products);
Console.WriteLine("Sorting Products By Units");
var productsComparerByUnits = new ProductsComparerByUnits();
products.Sort(productsComparerByUnits);
Print(products);
Console.WriteLine("Sorting Products By UnitCost");
var productsComparerByUnitCost = new ProductsComparerByUnitCost();
products.Sort(productsComparerByUnitCost);
Print(products);
Console.WriteLine("Sorting Products By Name");
/*
* ProductComparerDelegate compareProductsByName = (leftProduct, rightProduct) =>
* {
* return leftProduct.Name.CompareTo(rightProduct.Name);
* };
*/
ProductComparerDelegate compareProductsByName = (leftProduct, rightProduct) => leftProduct.Name.CompareTo(rightProduct.Name);
products.Sort(compareProductsByName);
Print(products);
Console.WriteLine("Filter products by Category [Stationary]");
var stationaryProductsSpecification = new ProductSpecificationByCategory("Stationary");
var stationaryProducts = products.Filter(stationaryProductsSpecification);
Print(stationaryProducts);
//var result = 0;
//passing method implementation explicitly
Console.WriteLine(PerformOperation(10, 20, Program.Add));
//Inlining the function implementation
Console.WriteLine(PerformOperation(10, 20, delegate(int x, int y){
return(x - y);
}));
//Using lambda expression
Console.WriteLine(PerformOperation(10, 20, (x, y) => {
return(x * y);
}));
//Using lambda expression (simpler implementation)
Console.WriteLine(PerformOperation(10, 20, (x, y) => x / y));
/*
* var calculator = new Calculator();
* Console.WriteLine(PerformOperation(100, 200, calculator.Add));
* Console.WriteLine(PerformOperation(100, 200, calculator.Subtract));
* Console.WriteLine(PerformOperation(100, 200, calculator.Multiply));
* Console.WriteLine(PerformOperation(100, 200, calculator.Divide));
*/
/*
* var nonStationaryProducts = products.Filter(delegate (Product product)
* {
* return product.Category != "Stationary";
* });
*/
/*
* var nonStationaryProducts = products.Filter(product =>
* {
* return product.Category != "Stationary";
* });
*/
var nonStationaryProducts = products.Filter(p => p.Category != "Stationary");
Console.WriteLine("Non Stationary products");
Print(nonStationaryProducts);
MyCollection <Customer> customers = new MyCollection <Customer>();
customers.Add(new Customer {
Id = 300, FirstName = "Magesh", LastName = "Kuppan"
});
customers.Add(new Customer {
Id = 305, FirstName = "Suresh", LastName = "Kannan"
});
customers.Add(new Customer {
Id = 302, FirstName = "Ganesh", LastName = "Shiva"
});
customers.Add(new Customer {
Id = 306, FirstName = "Ramesh", LastName = "Jayaraman"
});
customers.Add(new Customer {
Id = 301, FirstName = "Rajesh", LastName = "Kumar"
});
Console.WriteLine("Initial list of customers");
customers.Print();
Console.WriteLine("Sorting customers by Id");
customers.Sort((c1, c2) => c1.Id - c2.Id);
customers.Print();
Console.WriteLine("Sorting customers by FirstName [using interface & comparer class]");
customers.Sort(new CustomerComparerByFirstName());
customers.Print();
Console.WriteLine("Filtering customers with Id > 302 [using delegates");
var customersWithIdAbove302 = customers.Filter(c => c.Id > 302);
//customersWithIdAbove302.Print();
Console.WriteLine("Filtering customers with Id > 302 [using specification");
var customersWithIdAbove302Enumerable = customers.Filter(new CustomerSpecificationWithIdAbove302());
foreach (var customer in customersWithIdAbove302Enumerable)
{
Console.WriteLine(customer);
}
var c = new Customer {
Id = 500, FirstName = "Dummy", LastName = "Customer"
};
//MyUtils.WhoAmI(c);
//Console.WriteLine(MyUtils.FormatForConsole(c));
Console.WriteLine(c.FormatForConsole());
var p = new Product {
Id = 5, Name = "Pen", UnitCost = 10, Units = 50, Category = "Stationary"
};
//Console.WriteLine(MyUtils.FormatForConsole(p));
Console.WriteLine(p.FormatForConsole());
var maxId = customers.Max(customer => customer.Id);
Console.WriteLine($"Max Id of customers collection : {maxId}\n");
var customerNames = customers.Select(c => c.FirstName + ' ' + c.LastName);
/*
* foreach (var cn in customerNames)
* Console.WriteLine(cn);
*/
//customerNames.ForEach(cn => Console.WriteLine(cn));
customerNames.ForEach(Console.WriteLine);
}
