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jendiamond/plusminus.rb

Created November 4, 2015 00:35
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plusminus.rb
class PlusMinus
def +(a,b)
a-b
end
def -(a,b)
a+b
end
end
p x = PlusMinus.new.+(8,9)
p o = PlusMinus.new.-(8,9)
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