def _start
  re = /ruby/
  target = "mrubyedge"
  if m = (target =~ re)
    puts "matched: #{m}"
  end

  target2 = "micropython"
  if re !~ target2
    puts "not matched"
  end
  p re

  re3 = /(m?ruby).*?(m?ruby).*?(m?ruby(?:ists)?)/
  target3 = "mruby/edge is a mruby for embedded systems, built for rubyists."
  matched = re3.match(target3)
  if matched
    puts "matched: #{matched[0]}"
    puts "matched: #{matched[1]}"
    puts "matched: #{matched[2]}"
    puts "matched: #{matched[3]}"
  end
  p matched
end