My Sass Toolbox

_toolbox.scss

/*
|--------------------------------------------------------------------------
| List: Prefix
|--------------------------------------------------------------------------
|
| Add a prefix to all the list items
|
| @param  list   $list
| @param  string $string
| @return list
*/
@function prefixify($list, $string: '')
{
    $result: ();

    @for $i from 1 through length($list) {
        $value: nth($list, $i);

        $result: append($result, $string + $value);
    }

    @return $result;
}


/*
|--------------------------------------------------------------------------
| List: Implode
|--------------------------------------------------------------------------
|
| Join a list with a separator. Good for making selectors!
| http://hugogiraudel.com/2013/08/08/advanced-sass-list-functions/
|
| @param  list    $list
| @param  string  $glue
| @param  boolean $is-nested
| @return list
*/
@function implode($list, $glue: '', $is-nested: false)
{
    $result: null;

    @for $i from 1 through length($list) {
        $e: nth($list, $i);

        @if type-of($e) == list {
            $result: $result#{to-string($e, $glue, true)};
        }

        @else {
            $result: if($i != length($list) or $is-nested, $result#{$e}#{$glue}, $result#{$e});
        }
    }

    @return $result;
}