WordPress: Printout enqueued styles and scripts via their $handle.

function.php

function my_inspect_styles() {
    global $wp_styles;
    echo '<!-- Styles: ';
    foreach( $wp_styles->queue as $handle ) {
        echo $handle . ' | ';
    }
    echo '-->';
}
function my_inspect_scripts() {
    global $wp_scripts;
    echo '<!-- Scripts: ';
    foreach( $wp_scripts->queue as $handle ) {
        echo $handle . ' | ';
    }
    echo '-->';
}
add_action( 'wp_print_styles', 'my_inspect_styles' );
add_action( 'wp_print_scripts', 'my_inspect_scripts' );