static void Main(string[] args)
{
var allBooks = new BookRepository().GetBooks();
//PrintBooks(allBooks);
var titles = allBooks.Select(book => book.Title);
var anonyTypes = allBooks.Select(book => new { Ttl = book.Title, Prc = book.Price });
foreach (var anonyType in anonyTypes)
{
Console.WriteLine($"Title: {anonyType.Ttl}, Price: {anonyType.Prc}");
}
//var lessThan30RsBooks = allBooks.Where(book => FilterByPrice(book,30));
var lessThan30RsBooks = allBooks.Where(book => book.Price < 30);
if (allBooks.Any(book => book.Price > 30 && book.Author == "Mohit"))
{
Console.WriteLine("Hi Naina");
}
var firstBook = allBooks.First(book => book.Title.StartsWith("A"));
var skippedFirst = allBooks.First(book => book.Title.StartsWith("A"));
//Select <--To choose a specific property from the collection and return the collection of the type of chosen property.
//Where <- Filter the list and return the collection of the filtered items.
//Any <-- Returns true if any item is present in the list otherwise false.
//First <-- Returns the first element of the list. If not item is present then throws exception with the message, "Sequence contains no elements" (InvalidOperationException)
//Skip <-- Skips the number of elements specified in the params and returns the collection of remaining.
//All <-- Returns true/false after evaluating the specified condition on all the items of the list.
if (allBooks.All(book => book.Price > 0))
{
}
var highestPriceBook = allBooks.Skip(2).Max(book => book.Title);
var booksOfEachPrice = allBooks.GroupBy(book => book.Price).Select(g => g.Skip(1).First());
PrintBooks(booksOfEachPrice);
/*var dict = new Dictionary<int, IEnumerable<Book>>();
*
* dict[10] = new List<Book> {null, null};
* dict[20] = new List<Book> {null, null};
* dict[30] = new List<Book> {null, null,null};*/
var products = new List <Product>
{
new Mobile(),
new Mobile(),
new Laptop(),
new XBox(),
new XBox()
};
var mobiles = products.OfType <Mobile>();
var xboxes = products.OfType <XBox>();
var something = products.GroupBy(p => p.GetType() == typeof(Mobile)).First();
}