通常,您需要更改一组数据的结构方式并操纵某些值。
在下面的示例中,我们获得了带有附加折扣金额的书籍集合。但是我们宁愿有已经打折的价格的书清单。
$books = [ ['title' => 'The Pragmatic Programmer', 'price' => 20, 'discount' => 0.5], ['title' => 'Continuous Delivery', 'price' => 25, 'discount' => 0.1], ['title' => 'The Clean Coder', 'price' => 10, 'discount' => 0.75], ]; $discountedItems = collect($books)->map(function ($book) { return ['title' => $book["title"], 'price' => $book["price"] * $book["discount"]]; }); //[ // ['title' => 'The Pragmatic Programmer', 'price' => 10], // ['title' => 'Continuous Delivery', 'price' => 12.5], // ['title' => 'The Clean Coder', 'price' => 5], //]
这也可以用来改变的钥匙,让我们说我们要重点改变title到name这将是一个合适的解决方案。