WordPress: Show page instead of archive page

gistfile1.txt

function show_page_instead_of_archive_page( $request ) {
    if ( key_exists( 'category',  $request ) ) {
        $slug = $request['category'];
        $queried_post = get_page_by_path( $slug, OBJECT, 'page' );
        if ( $queried_post ) {
            $request['page_id'] = $queried_post->ID;
            unset( $request['category'] );
        }
    }

    return $request;
}
add_filter( 'request', 'show_page_instead_of_archive_page' );