isogram

elixir/isogram/lib/isogram.ex

@@ -0,0 +1,9 @@
+defmodule Isogram do
+  @doc """
+  Determines if a word or sentence is an isogram
+  """
+  @isogram ~r/(\w).*\1/i
+
+  @spec isogram?(String.t()) :: boolean
+  def isogram?(sentence), do: !Regex.match?(@isogram, String.downcase(sentence))
+end