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jhowarth/gist:2698558

Created May 15, 2012 02:12
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gistfile1.txt
irb(main):018:0> a = []
=> []
irb(main):019:0> a << 3
=> [3]
irb(main):020:0> a
=> [3]
irb(main):021:0> b = a
=> [3]
irb(main):022:0> b << 4
=> [3, 4]
irb(main):023:0> a
=> [3, 4]
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