View difference between Paste ID: zDJ5nsEr and

-
+function my_post_queries( $query ) {
   // not an admin page and it is the main query
   if (!is_admin() && $query->is_main_query()){
     if(is_home()){
       $query->set('posts_per_page', 1);
       if ( get_option( 'sticky_posts' ) ) {
          $post_ids = merge_sticky_posts();
          $query->set('ignore_sticky_posts', 1);
          $query->set('post__in', $post_ids);
          $query->set('orderby', 'post__in');
       }
     }
   }
 }
 add_action( 'pre_get_posts', 'my_post_queries' );
 
 function merge_sticky_posts() {
   if ( false === ( $post_ids = get_transient( 'all_post_ids' ) ) ) {
 
     $sticky_posts = get_option( 'sticky_posts' );
 
     $args = array(
        'posts_per_page' => -1,
        'ignore_sticky_posts' => 1,
        'post_status'   => 'publish',
        'no_found_rows' => true,
     );
 
     $posts = get_posts($args);
     if($posts) {
       $post_ids = array();
       foreach ($posts as $post) {
         $post_ids[] = $post->ID;
       }
     }
 
     $post_ids = array_merge($sticky_posts, $post_ids);
     set_transient('all_post_ids', $post_ids);
 
   }
 
   return $post_ids;
 }
 
 
 // altered version of the sort-query-by-post-in plugin
 // http://wordpress.org/extend/plugins/sort-query-by-post-in/
 add_filter( 'posts_orderby', 'merged_post_orderby', 10, 2 );
 function merged_post_orderby( $sortby, $thequery ) {
 
 if ( !empty($thequery->query_vars['post__in']) && isset($thequery->query_vars['orderby']) && $thequery->query_vars['orderby'] == 'post__in' ) {
     $sortby = "find_in_set(ID, '" . implode( ',', $thequery->query_vars['post__in'] ) . "')";
 }
 
   return $sortby;
 }
 
 // delete transient when updating a post
 add_action( 'save_post', 'update_all_ids' );
 add_action( 'delete_post', 'update_all_ids' );
 
 function update_all_ids( $post_id ) {
   //verify post is not a revision
   if ( !wp_is_post_revision( $post_id ) ) {
     delete_transient( 'all_post_ids' );
   }
 
 }