adworse

defmodule StringTrimmer do
  def trim_utf8(string, len), do: trim(string, len, &utf8_counter/1)

  def trim_utf16(string, len), do: trim(string, len, &utf16_counter/1)

  def trim(string, len, counter) do
    string
    |> String.graphemes()
    |> Enum.reduce_while({0, ""}, fn grapheme, {count, acc} ->
      count = count + counter.(grapheme)