Laravel 直接合并或合并两个集合的对象答案

【问题标题】：Laravel Combine or Merge objects of two Collection in straight wayLaravel 直接合并或合并两个集合的对象
【发布时间】：2021-04-16 20:08:56
【问题描述】：

$user = collect(["name"=>"sam","age"=>20],["name"=>"john","age"=>21],["name"=>"roz","age"=>19]);

$car = collect(["name"=>"sam","car"=>"BMW"],["name"=>"john","car"=>"Audi"],["name"=>"roz","car"=>"Ford"]);

我想合并或组合这两个集合并得到这样的输出：

$collection = (["name"=>"sam","age"=>20,"car"=>"BMW"],["name"=>"john","age"=>21,"car"=>"Audi"],["name"=>"roz","age"=>19,"car"=>"Ford"])

感谢您的支持。

【问题讨论】：

您对此有何疑问？

标签： php arrays laravel foreach collections

【解决方案1】：

$users = collect([["name"=>"sam","age"=>20],["name"=>"john","age"=>21],["name"=>"roz","age"=>19]]);
$cars = collect([["name"=>"sam","car"=>"BMW"],["name"=>"john","car"=>"Audi"],["name"=>"roz","car"=>"Ford"]]);

return $users->map(function ($item) use ($cars) {
        $car = $cars->first(fn ($value)=> $value['name'] === $item['name']);
        $item['car'] = $car['car'];
        return $item;
    })->all();

注意：您使用 collect 方法的方式不会给您想要的，您需要像上面的代码一样将整个包装在一个数组中。

【讨论】：

【解决方案2】：

如果集合是有序集合，您可以遍历其中一个并排列数据：

/**
 * Merging the user and the car collections
 * 
 * @param Collection $users
 * @param Collection $cars
 * 
 * @return Collection
 */
function mergeUserCollections(Collection $users, Collection $cars): Collection
{
    $result = [];

    foreach ($users as $index => $user) {
        $result[] = [
            'name' => $user['name'],
            'age' => $user['age'],
            'car' => $cars[$index]['car'],
        ];
    }

    return collect($result);
}


function getData()
{
    $users = collect([
        ["name"=>"sam", "age"=>20],
        ["name"=>"john", "age"=>21],
        ["name"=>"roz", "age"=>19]
    ]);
    $cars = collect([
        ["name"=>"sam", "car"=>"BMW"],
        ["name"=>"john", "car"=>"Audi"],
        ["name"=>"roz", "car"=>"Ford"]
    ]);

    $merged_data = mergeUserCollections($users, $cars);
}

如果不是，则按带有名称的汽车集合分组：

/**
 * Merging the user and the car collections
 * 
 * @param Collection $users
 * @param Collection $cars
 * 
 * @return Collection
 */
function mergeUserCollections(Collection $users, Collection $cars): Collection
{
    $result = [];

    $users_cars = $cars->keyBy('name');

    foreach ($users as $index => $user) {
        $result[] = [
            'name' => $user['name'],
            'age' => $user['age'],
            'car' => $users_cars[$user['name']]['car'],
        ];
    }

    return collect($result);
}

function getData()
{
    $users = collect([
        ["name"=>"sam", "age"=>20],
        ["name"=>"john", "age"=>21],
        ["name"=>"roz", "age"=>19]
    ]);
    $cars = collect([
        ["name"=>"sam", "car"=>"BMW"],
        ["name"=>"john", "car"=>"Audi"],
        ["name"=>"roz", "car"=>"Ford"]
    ]);

    $merged_data = mergeUserCollections($users, $cars);
}

【讨论】：