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Laravel 8 pluck() {#collection-method}

pluck 可以获取集合中指定键对应的所有值:

$collection = collect([
    ['product_id' => 'prod-100', 'name' => 'Desk'],
    ['product_id' => 'prod-200', 'name' => 'Chair'],
]);

$plucked = $collection->pluck('name');

$plucked->all();

// ['Desk', 'Chair'] 

你也可以通过传入第二个参数来指定生成集合的 key(键):

$plucked = $collection->pluck('name', 'product_id');

$plucked->all();

// ['prod-100' => 'Desk', 'prod-200' => 'Chair']

pluck 也支持利用”.” 标记的方法取出多维数组的键值:

$collection = collect([
    [
        'speakers' => [
            'first_day' => ['Rosa', 'Judith'],
            'second_day' => ['Angela', 'Kathleen'],
        ],
    ],
]);

$plucked = $collection->pluck('speakers.first_day');

$plucked->all();

// ['Rosa', 'Judith']


Laravel 8 pipeInto() {#collection-method}
Laravel 8 pop() {#collection-method}
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Laravel 8 入门指南

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