RGB To Hex Conversion

Elixir

defmodule Kata do
  def rgb(r,g,b) do
    Enum.map_join([r, g, b], fn x ->
      convert_to_hex(
        make_valid_value(x)
      )
    end)
  end

  def make_valid_value(num) do
    cond do
      num > 255 -> 255
      num < 0 -> 0
      true -> num
    end
  end

  def convert_to_hex(num) do
    hex = Integer.to_string(num, 16)
    if String.length(hex) == 1, do: "0" <> hex, else: hex
  end
end

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Tags

1. elixir (Private)
2. 5-kyu (Private)
3. codewars (Private)
4. answer (Private)