September 2017 Update

Task/Determine-if-a-string-is-numeric/Elixir/determine-if-a-string-is-numeric.elixir

@@ -2,13 +2,9 @@ defmodule RC do
   def is_numeric(str) do
     case Float.parse(str) do
       {_num, ""} -> true
-      {_num, _r} -> false               # _r : remainder_of_bianry
-      :error     -> false
+      _          -> false
     end
   end
 end
 
-strs = ["123", "-12.3", "123.", ".05", "-12e5", "+123", " 123", "abc", "123a", "12.3e", "1 2"]
-Enum.each(strs, fn str ->
-  IO.puts "#{inspect str}\t=> #{RC.is_numeric(str)}"
-end)
+["123", "-12.3", "123.", ".05", "-12e5", "+123", " 123", "abc", "123a", "12.3e", "1 2"] |> Enum.filter(&RC.is_numeric/1)