///
/// Slice `$list` between `$start` and `$end` indexes
///
/// @access private
///
/// @param {List} $list - List to slice
/// @param {Number} $start [1] - Start index
/// @param {Number} $end [length($list)] - End index
///
/// @return {List} Sliced list
///
@function slice($list, $start: 1, $end: length($list)) {
  @if length($list) < 1 or $start > $end {
    @return ();
  }

  $result: ();

  @for $i from $start through $end {
    $result: append($result, nth($list, $i));
  }

  @return $result;
}