[Ruby] Ruby class // initialized method

class Book #created my own data type and a template for what a book is
    attr_accessor :title, :author, :pages 
end

book1 = Book.new() #creating book object
book1.title = "Harry Potter"
book1.author = "JK Rowling"
book1.pages = 400

puts book1.title

여러번 쓰는 것을 initialized method를 이용해서 간결하게 쓸 수 있다.

class Book 
    attr_accessor :title, :author, :pages
    def initialize(title, author, pages)
        @title = title
        @author = author
        @pages = pages
    end 
end

book1 = Book.new("Harry Potter", "JK Rowling", 400)
book2 = Book.new("Load of the Ring", "Tolkein", 500)

puts book1.author # => JK Rowling