Contents

defmodule Squares do
  @moduledoc """
  Calculate sum of squares, square of sums, difference between two sums from 1 to a given end number.
  """

  @doc """
  Calculate sum of squares from 1 to a given end number.
  """
  @spec sum_of_squares(pos_integer) :: pos_integer
  def sum_of_squares(number) do
    Enum.reduce(1..number, 0, fn x, acc -> acc + x * x end)
  end

  @doc """
  Calculate square of sums from 1 to a given end number.
  """
  @spec square_of_sums(pos_integer) :: pos_integer
  def square_of_sums(number) do
    sum_to_number = Enum.reduce(1..number, fn x, acc -> x + acc end)
    sum_to_number * sum_to_number
  end

  @doc """
  Calculate difference between sum of squares and square of sums from 1 to a given end number.
  """
  @spec difference(pos_integer) :: pos_integer
  def difference(number) do
    square_of_sums(number) - sum_of_squares(number)
  end
end

Version data entries

69 entries across 69 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.179	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.178	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.177	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.176	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.175	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.174	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.173	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.172	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.171	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.170	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.169	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.167	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.166	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.165	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.164	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.163	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.162	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.161	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.160	tracks/elixir/exercises/difference-of-squares/example.exs