如何使用帶回調函數的array_map作爲數組元素的成員？

Question

我可以使用array_map替換此代碼：

$points = []; 
foreach($addresses as $address) $points[] = $address->getRoutePoint(); 
$this->points = $points; 

Answer 1

沒什麼特別的事：

$this->points = array_map(function($i) { return $i->getRoutePoint(); }, $addresses); 

但是，使用foreach更快，你不需要使用$points變量：

$this->points = []; 
foreach($addresses as $address) { 
    $this->points[] = $address->getRoutePoint(); 
}