sortByDesc
以给定的键对集合进行正序排序。
sortByDesc 方法默认是正序排序，即数值越小排序越靠前。
php
collect([
['product' => 'apples', 'price' => 9],
['product' => 'coconuts', 'price' => 3],
['product' => 'bananas', 'price' => 5],
])->sortByDesc('price');
/*
[
["product" => "apples", "price" => 9],
["product" => "bananas", "price" => 5],
["product" => "coconuts", "price" => 3],
]
*/如果需要按照数值越大越靠前的倒序排序方式，可以再调用 reverse 方法；
或者使用 sortBy 方法。
传入回调函数以决定如何对集合的值进行排序
php
collect([
['product' => 'apples', 'price' => 9, 'code' => 'A-30'],
['product' => 'coconuts', 'price' => 3, 'code' => 'A20'],
['product' => 'bananas', 'price' => 5, 'code' => 'A50'],
])->sortByDesc(fn ($item) => str_replace('-', '', $item['code']));
/*
[
["product" => "bananas", "price" => 5, "code" => "A50"],
["product" => "apples", "price" => 9, "code" => "A-30"],
["product" => "coconuts", "price" => 3, "code" => "A20"]
]
*/