Excluding variables in search?

require "./contact"

class AddressBook
    attr_reader :contacts

    def initialize
        @contacts = []
    end

    def print_address_book
        puts "Contact List"
        puts "-"*40
        contacts.each do |contact|
            puts contact.to_s('last_first')
            contact.print_phone_numbers.to_s + "/n" +
            contact.print_addresses.to_s
            puts "-"*40
        end
    end 

    def print_search(search, results)
        puts search
        puts "\n"
        results.each do |contact|
            puts contact.to_s('full_name')
            puts "-"*40
            contact.print_phone_numbers
            contact.print_addresses
            puts "\n"
            end
        end

    def find_by_name(name)
        results_num = []
        search = name.downcase
        contacts.each do |contact|
            if  contact.full_name.downcase.include?(search)
                results_num.push(contact)
            end
        end
        print_search("Name Search Results for: #{search}", results_num)
    end

    def find_by_number(number)
        results = []
        search = number.gsub('-', '')
        contacts.each do |contact|
            contact.phone_numbers.each do |phone_number|
                if phone_number.number.gsub('-', '').include?(search)
                    results.push(contact) unless results.include?(contact)
                end
            end
        end
        print_search("Name Search Results for: #{search}", results)
    end

    def find_by_address(address)
        results = []
        search = address.downcase
        contacts.each do |contact|
            contact.addresses.each do |address|
                if address.to_s('long').downcase.include?(search)
                    results.push(contact) unless results.include?(contact)
                end
            end
        end
        print_search("Address Search Results for: #{search} ", results)
    end
end

address_book = AddressBook.new

jason = Contact.new
jason.first_name = 'Jason'
jason.middle_name = 'Way'
jason.last_name = 'Woo'
jason.add_phone_number('Cell', '773-895-4068')
jason.add_phone_number('Home', '847-568-1581')
jason.add_address('Home', '9828 Keeler', "", 'Skokie', 'IL', '60076')


justin = Contact.new
justin.first_name = 'Justin'
justin.middle_name = ''
justin.last_name = 'Woo'
justin.add_phone_number('Cell', '623-111-3834')
justin.add_address('Home', '123 Main', "", 'New York', 'NY', '23145')



address_book.contacts.push(jason)
address_book.contacts.push(justin)


# address_book.find_by_name('j')
# puts "\n"
# address_book.find_by_number('8')
address_book.find_by_address('M')