首先，我尝试学习php。看完一些mvc教程后，有些事情让我烦恼。有什么区别，注册表类的最佳方法是什么： - 使单身人士成为全球性的？要么 - 使它成为普通类并通过__construct传递给其他类？
$controller = new $class($this->registry);
.......在路由器类......
function __construct($registry) {
$this->registry = $registry;
}
.......
Dump F;
(2343433,Argentina,2015,Sci-Fi)
(2343433,France,2015,Sci-Fi)
(2343433,Germany,2015,Sci-Fi)
(2343433,Netherlands,2015,Sci-Fi)
(2343433,Argentina,2015,Drama)
(2343433,France,2015,Drama)
(2343433,Germany,2015,Drama)
(2343433,Netherlands,2015,Drama)
(2343433,Argentina,2015,Family)
(2343433,France,2015,Family)
(2343433,Germany,2015,Family)
(2343433,Netherlands,2015,Family)
G = GROUP F BY (movie_id, country, year);
H = foreach G generate FLATTEN(group) as (movie_id, country, year), $1.$3 AS (genre:{T:(value:chararray)});
I = foreach H generate movie_id, country, year, FLATTEN(BagToTuple(genre.value));
Dump I;
(2343433,France,2015,Sci-Fi,Drama,Family)
(2343433,Germany,2015,Sci-Fi,Drama,Family)
(2343433,Argentina,2015,Sci-Fi,Drama,Family)
(2343433,Netherlands,2015,Sci-Fi,Drama,Family)
我看到这两个例子，我对正确的方式感到有点困惑...... 感谢