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mapWithKeys
方法遍歷集合并將每個(gè)值傳入給定的回調(diào)函數(shù)。該回調(diào)函數(shù)將返回一個(gè)包含單個(gè)鍵 / 值對的關(guān)聯(lián)數(shù)組:
$collection = collect([
[
'name' => 'John',
'department' => 'Sales',
'email' => 'john@example.com',
],
[
'name' => 'Jane',
'department' => 'Marketing',
'email' => 'jane@example.com',
]
]);
$keyed = $collection->mapWithKeys(function ($item) {
return [$item['email'] => $item['name']];
});
$keyed->all();
/*
[
'john@example.com' => 'John',
'jane@example.com' => 'Jane',
]
*/
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