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- class Squares
- def initialize(number)
- @number = number
- end
- def square_of_sum
- (1..@number).to_a.sum ** 2
- end
- def sum_of_squares
- (1..@number).to_a.map! { |number| number ** 2 }.sum
- end
- def difference
- square_of_sum - sum_of_squares
- end
- end
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