Is there a way to loop if statements targetting a specific variable from a list of objects C#-CodePudding

In my class (Book) there is a variable (Bcopies) that indicates how many of these objects are “borrowed” From my list (values) I already got the highest int which is to be displayed as the “most popular item” I would like a better way to display that instead of multiple if statements for each instance of the variable in question(Bcopies) I thought of a for-each loop but don’t know how to implement with a variable inside a list

here is my program

namespace Library
{
    class Program
    {
        static void Main(string[] args)
        {
            Book book1 = new Book("book one", "Author one", 900, 35, 16);
            Book book2 = new Book("book two", "Author two", 240, 42, 8);
            Book book3 = new Book("book three", "Author three", 700, 23, 8);
         
            List<Book> BLibShelf = new List<Book>();
            BLibShelf.AddRange(new List<Book>() { book1, book2, book3, book4, book5, book6, book7,  book8 });

            var values = new List<int> { book1.BCopies, book2.BCopies, book3.BCopies, book4.BCopies, book5.BCopies, book6.BCopies, book7.BCopies, book8.BCopies };

            var t = values.Max();

//if statements allocating the "most popular"

if (book1.BCopies == t)
           {
               Console.WriteLine(book1);
           }
           if (book2.BCopies == t)
           {
               Console.WriteLine(book2);
           }
           if (book3.BCopies == t)
           {
               Console.WriteLine(book3);
           }

here is my class

class Book
    {
        public string title;
        public string author;
        public int pages;
        public int Libcopies;
        public int BCopies;
                     
        public Book(string nTitle, string nAuthor, int nPages, int nLcopies, int nBcopies)
        {
            title = nTitle;
            author = nAuthor;
            pages = nPages;
            Libcopies = nLcopies;
            BCopies = nBcopies;
        }

        public override string ToString()
        {
            return "Book Title:"   title   " |Author:"   author   " |Pages:"   pages   " |Library Copies:"   Libcopies   " |Borrowed Copies:"   BCopies;
        }
        public int TotalCopy()
        {
            
            return BCopies   BCopies;
        }

    }

CodePudding user response：

Use LINQ:

List<Book> BLibShelf = new List<Book>
{
    new Book("book one", "Author one", 900, 35, 16),
    new Book("book two", "Author two", 240, 42, 8),
    new Book("book three", "Author three", 700, 23, 8)
};

Book mostPopularBook = BLibShelf.OrderByDescending(b => b.BCopies).First();
Console.WriteLine(mostPopularBook);

Language Integrated Query (LINQ) (C#)

CodePudding user response：

If you are using .NET 6 you can use the new MaxBy Linq method:

var mostPopularBook = BLibShelf.MaxBy(b => b.BCopies);

CodePudding user response：

You are looking for ArgMax - argument (book in your case) on which we have Max value (BCopies). You can do it with a help of Linq either via MaxBy (wants .Net 6 ) or Aggregate (lower .Net versions):

  using System.Linq;

  ...

  Book mostPopular = BLibShelf
    .Aggregate((most, book) => most.BCopies > book.BCopies ? most : book);

  Console.Write($"The most popular book is {mostPopular}");