Post loop for all taxonomy terms

You can get all the terms in a custom taxonomy using the following code:

$terms = get_terms( 'development-category' );
if ( ! empty( $terms ) && ! is_wp_error( $terms ) ){
    foreach ( $terms as $term ) {
        $loop = new WP_Query( array( 'development-category' => $term->slug, 'post_type' => 'developments' ) ); ?>
        ....    
    }
}