// Sorts numeric values of $list
// -------------------------------------------------------------------------------
// @documentation http://sassylists.com/documentation/#sort
// -------------------------------------------------------------------------------
// @alias `order()`
// -------------------------------------------------------------------------------
// @dependence `last()`
// @dependence `insert-nth()`
// -------------------------------------------------------------------------------
// @example sort(5 12 4.7 6 69 6)          => 4.7, 5, 6, 6, 12, 69
// @example sort(5 12 4.7 "8" 6 14px 69 6) => 4.7, 5, 6, 6, 12, 69
// -------------------------------------------------------------------------------
// @param $list [List] : list
// -------------------------------------------------------------------------------
// @raise [Warning] if not unitless number found
// -------------------------------------------------------------------------------
// @return [List]

@function sort($list) {
    $result : nth($list, 1);

    @if length($list) > 1 {

        @for $i from 2 through length($list) {
            $item: nth($list, $i);

            @if type-of($item) == number {

                @if unitless($item) {

                    @if $item > last($result) {
                        $result: append($result, $item);
                    }

                    @else {
                        $index: 0;

                        @for $i from length($result) * -1 through -1 {
                            $i: abs($i);

                            @if $item <= nth($result, $i) {
                                $index: $i;
                            }
                        }
                        
                        $result: insert-nth($result, $index, $item); 
                    }

                }

                @else {
                    @warn "Not unitless number found. Omitted.";
                }

            } 

            @else {
                @warn "Not integer value found. Omitted.";
            }
        }
    }

    @return $result;
}

// Alias
@function order($list) {
    @return sort($list);
}