如何将带有回调函数的array_map用作数组元素的成员？

Question

我可以使用array_map替换此代码：

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

Answer 1

没什么特别要做的：

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

但是，使用foreach的速度更快，您无需使用$points变量：

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