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matbhz/gist:5880297

Created June 27, 2013 20:51
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gistfile1.rb
irb(main):032:0> a = 1
=> 1
irb(main):033:0> b = a
=> 1
irb(main):034:0> a = 2
=> 2
irb(main):035:0> b
=> 1
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