// Removes duplicate values from $list
// -------------------------------------------------------------------------------
// @documentation http://sassylists.com/documentation/#remove-duplicates
// -------------------------------------------------------------------------------
// @alias `unique()`
// -------------------------------------------------------------------------------
// @example remove-duplicates(a b a c b d c e)   => a, b, c, d, e
// @example remove-duplicates(a b (c c c), true) => a, b, c
// -------------------------------------------------------------------------------
// @param $list [List] : list
// @param $recursive [Boolean] : enable / disable recursivity
// -------------------------------------------------------------------------------
// @return [List]

@function remove-duplicates($list, $recursive: false) {
    $result: ();

    @each $item in $list {
        @if not index($result, $item) {
            @if length($item) > 1 and $recursive {
                $result: append($result, remove-duplicates($item, $recursive));
            }

            @else {
                $result: append($result, $item);
            }
        }
    }

    @return $result;
}

// Alias
@function unique($list, $recursive: false) {
    @return remove-duplicates($list, $recursive);
}