Randomize the content within brackets in the form of [ a | b ]

randomize_sentence.rb

require "benchmark"

# Originally written by @blazeeboy
# See https://gist.github.com/9429208
def generate(result)
  # ...
end

def randomize_sentence(sentence)
  randomized_sentence = sentence.gsub(/\[[^\[\]]+\]/) { |s| s[1..-2].split("|").shuffle.first }
  randomized_sentence == sentence ? randomized_sentence : randomize_sentence(randomized_sentence)
end

sentence = "[Hello|Hi] my [friend|dear], how [are you [today|these days]|is your brother]!"

Benchmark.bm do |x|

  x.report "Emad " do
    10000.times { generate(sentence) }
  end

  x.report "Robin" do
    10000.times { randomize_sentence(sentence) }
  end

end

# >>        user     system      total        real
# >> Emad   0.530000   0.000000   0.530000 (  0.532713)
# >> Robin  0.160000   0.000000   0.160000 (  0.158647)