From: Giampiero Zanchi <cidza@...>
Date: 2009-02-11T23:41:43+09:00
Subject: Re: Method to get string combinations

my_text = "This {is|was} a {good|nice} day"
r = /\{(.*?)\}/
elem = my_text.split(r).map! {|x| x.split("|")}
comb = []
elem.each_index do |i|
  if comb.empty?
    elem[i].each {|x| comb << x}
  else
    comb_size = comb.size
    0...comb_size.times do |j|
      elem[i].each { |x| s = comb.first + x ; comb.push(s) }
      comb.shift
    end
  end
end
p comb

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