From: Brian Candler <B.Candler@...>
Date: 2007-05-11T00:35:36+09:00
Subject: Re: loop questions

On Thu, May 10, 2007 at 10:31:36PM +0900, Lloyd Linklater wrote:
> Excellent!  I tried this right away and was able to make this mission 
> critical app:
> 
> b = " bottles of beer"
> w = " on the wall.  "
> t = "  Take one down and pass it around.  "
> 
> 99.downto(1) do |i|
>   puts i.to_s + b + w + i.to_s + b + "." + t + (i - 1).to_s + b + w
> end

Whilst the following violates the Don't Repeat Yourself mantra, I think it's
even clearer like this:

99.downto(1) do |i|
  puts <<EOS
#{i} bottles of beer on the wall.
#{i} bottles of beer.
Take one down and pass it around.
#{i-1} bottles of beer on the wall.
EOS
end

Actually, there's a bug which needs fixing:

def bottles(n)
  "#{n} bottle#{n != 1 ? "s" : ""} of beer"
end
99.downto(1) { |i| puts <<EOS }
#{bottles(i)} on the wall.
#{bottles(i)}.
Take one down and pass it around.
#{bottles(i-1)} on the wall.
EOS