From: hal9000@...
Date: 2000-07-21T16:38:14+00:00
Subject: [ruby-talk:04161] Regex question

The program here is totally frivolous -- it prints out the
obnoxious drinking song "99 Bottles of Beer on the Wall."

But the regex question is real. I'm not doing the substituting
the "proper" way -- a block with \1 \2 and so on.

Would someone care to improve this?

Of course, comments unrelated to the regex are welcome also.
But it's not really intended to be elegant or efficient. :)

Thanks,
Hal

--------------
class Inebriation
  What="N bottle of beer"
  Where=" on the wall"
  How="Take one down and pass it around,\n"

  Verse = What + Where + ",\n" + What + ";\n" + How + What + Where + "!
\n\n"

  def drink(*brew)
    brew.each do |x|
      cold_one = Verse.sub /N/,x.to_s
      cold_one.sub! /N/,x.to_s
      cold_one.sub! /N/,(x-1).to_s
      cold_one.sub! /bottle /,"bottles " unless x == 1
      cold_one.sub! /bottle /,"bottles " unless x == 1
      regex = Regexp.new("#{x-1} bottle ")
      cold_one.sub! regex,"#{x-1} bottles " unless (x-1) == 1
      print cold_one
    end
  end
end

blitzkrieg = Inebriation.new

beer=(1..99).to_a.reverse!

blitzkrieg.drink *beer
--------------


--
Hal Fulton


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