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kristopher/gist:100868

Created April 24, 2009 01:02
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gistfile1.rb
class Array
def sum
inject(0) do |memo, i|
memo += i
end
end
end
sum_method = Array.instance_method(:sum)
Array.send(:remove_method, :sum)
[1,2].sum
=> NoMethodError: undefined method `sum' for [1, 2]:Array
sum_method.bind([1,2]).call
=> 3
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