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Adzz/zip_blog_post_6.ex

Created June 16, 2019 15:11
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zip_blog_post_6.ex
defprotocol Subtract do
def calculate(a, b)
end
# And implement it
defimpl Subtract, for: Integer do
def calculate(a, b) when is_integer(b), do: a - b
end
defimpl Subtract, for: Decimal do
def calculate(a, b = %Decimal{}), do: Decimal.sub(a, b)
end
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