From: Nanyang Zhan <sxain@...>
Date: 2008-01-10T02:36:04+09:00
Subject: method that generate block?

Hi, could anyone tell me how to code a method/methods that generates
these blocks? thanks.
    vds[0].each do |d0|
      vds[1].each do |d1|
      ...
        vds[n].each do |dn|
          ds = [d0, d1..., dn]
          create_new_filter(ds)
        end
      end
      ...
    end
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