//compare two libraries
public int CompareTo(LibraryICom other)
{
if (this.Books.Count > other.Books.Count)
{
return(1);
}
else if (this.Books.Count < other.Books.Count)
{
return(-1);
}
else
{
//if equal
return(0);
}
}
static void Main(string[] args)
{
var library1 = new LibraryICom();
library1.AddBook(new Book("1984", 1980, new List <string> {
"Jorgh"
}));
library1.AddBook(new Book("The god father", 1981, new List <string> {
"Pesho"
}));
library1.AddBook(new Book("The lord of the rings", 1985, new List <string> {
"J.K tolkin"
}));
//we can use IEnumerable with linq
//IEnumerable interate two custom classes
foreach (var book in library1.Where(x => x.Year > 1960))
{
Console.WriteLine(
$"{string.Join(" ",book.Authors)} - {book.Title} ({book.Year})");
}
//IComparable compare two custom classes
var library2 = new LibraryICom();
library2.AddBook(new Book("string", 1992, new List <string> {
"param"
}));
if (library1.CompareTo(library2) == 0)
{
Console.WriteLine("equal");
}
else if (library1.CompareTo(library2) == -1)
{
Console.WriteLine("Library one is bigger");
}
else
{
Console.WriteLine("Library two is bigger");
}
}
