PHP ArrayList::limit方法代码示例

	public function testLimit() {
		$list = new ArrayList(array(
			array('Key' => 1), array('Key' => 2), array('Key' => 3)
		));
		$this->assertEquals($list->limit(2,1)->toArray(), array(
			array('Key' => 2), array('Key' => 3)
		));
	}

 /**
  * @param \DataList|\ArrayList $items
  * @param                      $filters
  * @param array                $parameters
  */
 public function sequenceGridListItems(&$items, $filters, &$parameters = [])
 {
     $limit = isset($parameters['PageLength']) ? $parameters['PageLength'] : null;
     // filter items for each filter to current page length
     if ($limit) {
         $start = GridList::service()->Filters()->start() ?: 0;
         $out = new \ArrayList();
         $currentFilter = GridList::service()->constraint(Constraints::FilterVar);
         if ($currentFilter && $currentFilter != 'all') {
             if ($filter = GridListFilter::get()->filter(['ModelTag' => $currentFilter])->first()) {
                 $out->merge($items->limit($limit, $start));
             }
         } else {
             foreach ($filters as $filter) {
                 $filtered = new \ArrayList();
                 foreach ($items as $item) {
                     if ($item instanceof Block) {
                         // only push blocks first page
                         if ($start == 0) {
                             $filtered->push($item);
                         }
                     } else {
                         if ($currentFilter == 'all') {
                             $filtered->push($item);
                         } else {
                             if ($item->GridListFilters()->find('ID', $filter->ID)) {
                                 $filtered->push($item);
                             }
                         }
                     }
                 }
                 // merge limited filtered items back in
                 $out->merge($filtered->limit($limit, $start));
             }
         }
         $items = $out;
     }
 }

 /**
  * Returns a collection of Vimeo videos for a given method.
  * @param string
  * @param array
  * @param integer
  * @return DataObjectSet or boolean false
  */
 function getVideoFeed($method = NULL, $call_params = array(), $page_limit = 10)
 {
     if (!self::$api_key || !self::$api_secret_key) {
         user_error('Fatal error: Invalid API keyand/or secret specified!');
         return false;
     }
     // Prepare oauth arguments
     $oauth_params = array('oauth_consumer_key' => self::$api_key, 'oauth_version' => '1.0', 'oauth_signature_method' => 'HMAC-SHA1', 'oauth_timestamp' => time(), 'oauth_nonce' => $this->_generateNonce());
     $page = $call_params['start'] == 0 ? 1 : $call_params['start'] / $page_limit + 1;
     if (self::$token) {
         $oauth_params['oauth_token'] = self::$token;
     }
     $api_params = array('format' => 'php', 'full_response' => 1, 'per_page' => $page_limit, 'page' => $page);
     if (!empty($method)) {
         $api_params['method'] = $method;
     }
     // Merge args
     foreach ($call_params as $k => $v) {
         if (strpos($k, 'oauth_') === 0) {
             $oauth_params[$k] = $v;
         } else {
             $api_params[$k] = $v;
         }
     }
     // Generate the signature
     $oauth_params['oauth_signature'] = $this->_generateSignature(array_merge($oauth_params, $api_params), self::$api_base_url);
     // Merge all args
     $params = array_merge($oauth_params, $api_params);
     $this->setQueryString($params);
     $response = $this->request();
     $videos = unserialize($response->getBody());
     if (isset($videos->videos)) {
         $results = new ArrayList();
         foreach ($videos->videos->video as $video) {
             $data = $this->_extractVideoInfo($video);
             /*
              * @todo Add sorting
              */
             $results->push(new ArrayData($data));
         }
         // since we manually created the dataobjectset, we need to set the pager info manually, too.
         $results->limit($call_params['start'], $page_limit, intval($videos->videos->total));
     } else {
         $results = false;
     }
     return $results;
 }

 function getLatestTweets()
 {
     require Director::baseFolder() . '/twitter-feed/libs/tmhOAuth.php';
     require Director::baseFolder() . '/twitter-feed/libs/tmhUtilities.php';
     $tmhOAuth = new tmhOAuth(array('consumer_key' => self::get_consumer_key(), 'consumer_secret' => self::get_consumer_secret(), 'user_token' => self::get_user_token(), 'user_secret' => self::get_user_secret(), 'curl_ssl_verifypeer' => false));
     $code = $tmhOAuth->request('GET', $tmhOAuth->url('1.1/statuses/user_timeline'), array('screen_name' => self::get_username(), 'count' => self::get_tweetcount() + 10, 'exclude_replies' => true));
     $response = $tmhOAuth->response['response'];
     $tweets = json_decode($response, true);
     if ($this->_errorCheck($tweets)) {
         return false;
     }
     $output = new ArrayList();
     foreach ($tweets as &$tweet) {
         $tweet['text'] = $this->tweetConvert($tweet['text']);
         $time = SS_Datetime::create('SS_Datetime');
         $time->setValue($tweet['created_at']);
         $tweet['created_at'] = $time;
         //
         $tweet['username'] = self::get_username();
         $output->push(new ArrayData($tweet));
     }
     return $output->limit(self::get_tweetcount());
 }