Clearfix code without duplication

_clearfix.scss

%display-block-hacked {
    display: block;
    *zoom: 1;
}

%clear-both {
    clear : both;
}

%blank-as-table {
    display: table;
    content: " ";
}

%clearfix {
    &:before{
        @extend %blank-as-table;
    }
    & {
        @extend %display-block-hacked;
    }
    &:after {
        @extend %blank-as-table;
        @extend %clear-both;
    }
}

nice.