99 Bottles of Beer

Voting

Bookmarking

Language Ruby

(object-oriented version)

Date:	04/20/05
Author:	Mike Gertz
URL:	n/a
Comments:	2
Info:	http://www.rubycentral.com
Score:	(3.03 in 39 votes)

#99 Bottles of beer, in Ruby
#by Mike Gertz, Jan 5, 2003
#See www.rubycentral.com for info on the language.

class OneBottle
     def sing
	puts "One bottle of beer on the wall."
	puts "One bottle of beer."
	puts "Take it down, pass it around."
	puts "No more bottles of appear on the wall!"
     end
end

class TwoBottles
     def sing
	puts "Two bottles of beer on the wall."
	puts "Two bottles of beer."
	puts "Take one down, pass it around."
	puts "One bottle appears on the wall."
	puts 
     end
end

class Bottles
    attr_reader :number

    def Bottles.verse( number )
	if number > 2
	    Bottles.new( number )
        elsif number == 2
	    TwoBottles.new
	else
	    OneBottle.new
        end
    end

    def initialize( number )
        @number = number
    end

    def sing
	puts "#{number} bottles of beer on the wall."
	puts "#{number} bottles of beer."
	puts "Take one down, pass it around,"
	puts "#{number - 1} bottles appear on the wall!"
	puts
    end
end

99.downto(1) do | i |
    Bottles.verse(i).sing
end

Download Source | Write Comment

Alternative Versions

Version	Author	Date	Comments
Using continuations, singleton classes	Victor Borja	09/15/06	9
minimal version	Anonymous	05/18/05	3
shows inheritance, iterators, yield, etc	Kian Wright	06/10/05	0
alternative version	Greg T.	05/18/05	10
In words	Daniel Straight	07/10/06	1
wall-based OO version	Kevin Baird	07/07/05	2
monkeypatch and anonymous procs	J. B. Rainsberger	04/04/07	0
Readably re-opening Integer, teetotaller	Eric Budd	01/06/08	0

Comments

Gerardo Garza said on 01/15/07 01:12:28

Here is an OO version I wrote last year after reading the "Ruby in Twenty Minutes" tutorial at a Ruby language website (www.ruby-lang.org) and doing some further research into syntax. GG

-------------------------
#!/usr/bin/ruby

# 99 Bottles of Beer in Ruby (OO version)
# by Gerardo Garza, 2006

class Bottle
attr_accessor :count

def initialize (count=99)
@count = count
@start = count
@old = count
end

def how_many
if (@count > 1)
output = "#{@count.to_s} bottles of beer"
elsif (@count == 1)
output = "#{@count.to_s} bottle of beer"
else
output = "No bottles of beer"
end

if (@count == @old)
puts "#{output} on the wall. #{output}."
else
puts "#{output} on the wall."
@old = @count
end
end

def take_down
if (@count == 0)
print "Go to the store, buy some more. "
@count = @start
else
print "Take one down, pass it around. "
@count -= 1
end
end
end

killians = Bottle.new

killians.count.downto(0) do
puts
killians.how_many
killians.take_down
killians.how_many
end

Devlin said on 07/12/08 06:11:22

class OneBottle
def sing
puts "One bottle of beer on the wall."
puts "One bottle of beer."
puts "Take it down, pass it around."
puts "No more bottles of appear on the wall!"
end
end

Couldn't that have just been a function instead of a function within a class? Just a bit excessive.

Download Source | Write Comment

Add Comment

Please provide a value for the fields Name, Comment and Security Code.
This is a gravatar-friendly website.
E-mail addresses will never be shown.
Enter your e-mail address to use your gravatar.

Please don't post large portions of code here! Use the form to submit new examples or updates instead!

one program in 1500 variations