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takkanm/gist:10447368

Created April 11, 2014 07:41
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gistfile1.txt
irb(main):001:0> a = []
=> []
irb(main):002:0> h = a.hash
=> 4042432731835813366
irb(main):003:0> a.push 1
=> [1]
irb(main):004:0> h == a.hash
=> false
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