99 Bottles of Beer

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Language Ruby

(wall-based OO version)

Date:	07/07/05
Author:	Kevin Baird
URL:	n/a
Comments:	2
Info:	http://ruby-lang.org
Score:	(2.95 in 19 votes)

#!/usr/bin/env ruby
# 99 bottles problem in Ruby

class Wall

  def initialize(num_of_bottles)
    @bottles = num_of_bottles
  end

  def sing_1_verse
    @output = sing_num(@bottles) + " on the wall, " + sing_num(@bottles) + "\n"
    @output += "take one down, pass it around, " + sing_num(@bottles-1) + "\n\n"
    return @output
  end

  def sing_all
    @output = ''
    while @bottles > 0 do
      @output += sing_1_verse()
      @bottles -= 1
    end
    return @output
  end
  
  def sing_num(num)
    @counter = (num > 1) ? 'bottles' : 'bottle'
    "#{num} #{@counter} of beer"
  end

end # class Wall

wall = Wall.new(99)
puts wall.sing_all()

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Alternative Versions

Version	Author	Date	Comments
Using continuations, singleton classes	Victor Borja	09/15/06	9
object-oriented version	Mike Gertz	04/20/05	2
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
monkeypatch and anonymous procs	J. B. Rainsberger	04/04/07	0
Readably re-opening Integer, teetotaller	Eric Budd	01/06/08	0

Comments

AEDE said on 10/28/05 14:51:31

smart but not very ruby oriented...
looks like C++ to me...

Brad said on 03/08/08 22:16:30

This looks very clean to me. I'm looking for an easy to grok scripting language and something that slides into OO this easy is to be commended. It doesn't look like C++ to me (nor Java for that matter.) It looks a bit easier/simpler than trying the same in Python.

This has been an extremely useful example to me.

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one program in 1500 variations