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foca/gist:780408

Created January 14, 2011 22:29
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gistfile1.rb
ruby-1.9.2-rc2 > a = [1, 2, 3]
=> [1, 2, 3]
ruby-1.9.2-rc2 > a[3, 0]
=> []
ruby-1.9.2-rc2 > a[4, 0]
=> nil
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