问如何在数组中找到最频繁的多个值

EN

 [#<Order:0x0000562626492558 @book="Codename: American Man", @reader="Mariel Beier", @date="30.03.2021">, 
    #<Order:0x00005626264924e0 @book="Forbidden Wizard", @reader="Mariel Beier", @date="30.03.2021">,
     #<Order:0x0000562626492468 @book="Action Ninja", @reader="Taryn Gutmann", @date="30.03.2021">,
     #<Order:0x00005626264923f0 @book="Action Ninja", @reader="Garret Lindgren", @date="30.03.2021">, 
    #<Order:0x0000562626492378 @book="Forbidden Wizard", @reader="Alysa Keeling", @date="30.03.2021">, 
    #<Order:0x0000562626492300 @book="War of the American Imp", @reader="Garrett Stroman", @date="30.03.2021">, 
    #<Order:0x0000562626492288 @book="Blue Witch", @reader="Garrett Stroman", @date="30.03.2021">, 
    #<Order:0x0000562626492210 @book="War of the American Imp", @reader="Sherlyn Schumm", @date="30.03.2021">, 
    #<Order:0x0000562626492198 @book="Action Ninja", @reader="Mac Funk", @date="30.03.2021">, 
    #<Order:0x0000562626492120 @book="Forbidden Wizard", @reader="Mariel Beier", @date="30.03.2021">, 
    #<Order:0x00005626264920a8 @book="The Nuclear Wolves", @reader="Les Conn", @date="30.03.2021">, 
    #<Order:0x0000562626492030 @book="War of the American Imp", @reader="Taryn Gutmann", @date="30.03.2021">, 
    #<Order:0x0000562626491fb8 @book="War of the American Imp", @reader="Les Conn", @date="30.03.2021">, 
    #<Order:0x0000562626491f40 @book="The Nuclear Wolves", @reader="Les Conn", @date="30.03.2021">, 
    #<Order:0x0000562626491ec8 @book="Action Ninja", @reader="Diamond Cole", @date="30.03.2021">, 
    #<Order:0x0000562626491e50 @book="Action Ninja", @reader="Garret Lindgren", @date="30.03.2021">]

  def build_author
    name = FFaker::Book.author
    biography = FFaker::Book.description
    Author.new(name, biography)
  end

  def build_book(author)
    title = FFaker::Book.title
    Book.new(title, author.name)
  end

  def build_reader
    name = FFaker::Name.name
    email = FFaker::Internet.email
    city = FFaker::Address.city
    street = FFaker::Address.street_name
    house = rand(1 - 10_000)
    Reader.new(name, email, city, street, house)
  end

  def build_order(book, reader)
    date = Time.now.utc.strftime('%d.%m.%Y')
    Order.new(book.title, reader.name, date)
  end

  def fill_author
    3.times do
      author = build_author
      @authors.push(author)
    end
  end

  def fill_book
    6.times do
      book = build_book(@authors.sample)
      @books.push(book)
    end
  end

  def fill_reader
    10.times do
      reader = build_reader
      @readers.push(reader)
    end
  end

  def fill_order
    16.times do
      @orders.push(build_order(@books.sample, @readers.sample))
    end
  end

class Library
  include DataBuilder
  include Statistics

  attr_accessor :authors, :books, :orders, :readers

  def initialize(authors: [], books: [], orders: [], readers: [])
    @books = books
    @orders = orders
    @readers = readers
    @authors = authors
  end

  def create_data
    create_arrays
    generate_data
  end

  def show
    create_data
    p top_reader
  end

  def top_reader
    orders_grouped = orders.group_by(&:reader)
    tab = orders_grouped.max_by { |_k, v| v.count }.first
    puts "#{tab} is the top reader"
  end

  def top_book
    orders_grouped = orders.group_by(&:book)
    tab = orders_grouped.max_by { |_k, v| v.count }.first
    puts "#{tab} is the top book"
  end

Mariel Beier is the top reader
Action Ninja is the top book