14 lines
320 B
Elixir
14 lines
320 B
Elixir
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defmodule ArmstrongNumber do
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@moduledoc """
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Provides a way to validate whether or not a number is an Armstrong number
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"""
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@spec valid?(integer) :: boolean
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def valid?(number) do
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digits = Integer.digits(number)
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power = length(digits)
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Enum.reduce(digits, 0, &(&1 ** power + &2)) == number
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end
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end
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