One Post From Each Category

gistfile1.txt

<?php
    $categories = get_categories(); 
 
    foreach ( $categories as $category ) {
		$args = array(
		    'cat' => $category->term_id,
		    'post_type' => 'post',
		    'posts_per_page' => '1',
		);
		$query = new WP_Query( $args );
		 
		if ( $query->have_posts() ) { ?>
		 
		    <section class="<?php echo $category->name; ?> listing">
		        <h2>Latest in <?php echo $category->name; ?>:</h2>
		 
		        <?php while ( $query->have_posts() ) {
		 
		            $query->the_post();
		            ?>
		 
		            <article id="post-<?php the_ID(); ?>" <?php post_class( 'category-listing' ); ?>>
		                <?php if ( has_post_thumbnail() ) { ?>
		                    <a href="<?php the_permalink(); ?>">
		                        <?php the_post_thumbnail( 'thumbnail' ); ?>
		                    </a>
		                <?php } ?>
		 
		                <h3 class="entry-title">
		                    <a href="<?php the_permalink(); ?>">
		                        <?php the_title(); ?>
		                    </a>
		                </h3>
		 
		                <?php the_excerpt( __( 'Continue Reading <span class="meta-nav">&rarr;</span>', 'twentyfourteen' ) ); ?>
		 
		            </article>
		 
		        <?php } // end while ?>
		 
		    </section>
		 
		<?php } // end if
		 
		// Use reset to restore original query.
		wp_reset_postdata();
    }
?>