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

327 entries across 327 versions & 1 rubygems

Version	Path
trackler-2.2.1.109	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.108	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.107	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.106	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.105	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.104	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.103	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.102	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.101	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.100	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.99	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.98	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.97	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.96	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.95	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.94	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.93	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.92	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.91	tracks/elixir/exercises/difference-of-squares/example.exs
trackler-2.2.1.90	tracks/elixir/exercises/difference-of-squares/example.exs