Created
December 11, 2018 19:32
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Difference of Squares: Exercism/Project Euler problem
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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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