英文:
How to apply custom keys to my sequential array/collection of arrays using Laravel or PHP?
问题
我正在尝试在Laravel中对集合应用自定义键。
我找到的最佳方法是使用transform或mapWithKeys等函数。
$result = $collection->map(function ($item) {return ['custom_key_name_1' => $item[0],'custom_key_name_2' => $item[1],'custom_key_name_3' => $item[2],];});
我希望能找到类似以下的方法：
$keys = ['custom_key_name_1', 'custom_key_name_2', 'custom_key_name_3'];$result = $collection->withKeys($keys);
您是否知道还有其他方式可以用更简洁的代码来实现这个目标？
我正在使用一个旧的Laravel 5.5项目。
输入示例
$collection = collect([[ 'first', 'second', 'third' ],[ '1', '2', '3' ],[ '1st', '2nd', '3rd' ],]);
预期输出
[['custom_key_name_1' => 'first','custom_key_name_2' => 'second','custom_key_name_3' => 'third',],['custom_key_name_1' => '1','custom_key_name_2' => '2','custom_key_name_3' => '3',],['custom_key_name_1' => '1st','custom_key_name_2' => '2nd','custom_key_name_3' => '3rd',],]
英文:
I'm trying to apply custom keys to a collection in laravel.
The best way that I found was using functions like transform or mapWithKeys.
$result = $collection->map(function ($item) {return ['custom_key_name_1' => $item[0],'custom_key_name_2' => $item[1],'custom_key_name_3' => $item[2],];});
I was hoping to find something like:
$keys = ['custom_key_name_1', 'custom_key_name_2', 'custom_key_name_3'];result = $collection->withKeys($keys);
Do you know any other way to do that with a less verbose code?
I'm working in a legacy Laravel 5.5 project.
Input Example
$collection = collect([[ 'first', 'second', 'third' ],[ '1', '2', '3' ],[ '1st', '2nd', '3rd' ],]);
Expected Output
[['custom_key_name_1' => 'first','custom_key_name_2' => 'second','custom_key_name_3' => 'third',],['custom_key_name_1' => '1','custom_key_name_2' => '2','custom_key_name_3' => '3',],['custom_key_name_1' => '1st','custom_key_name_2' => '2nd','custom_key_name_3' => '3rd',],]
答案1
得分: 1
由于您正在使用一个数组集合，您可以使用PHP的array_combine()方法将键和值组合在一起：
$collection = collect([[ 'first', 'second', 'third' ],[ '1', '2', '3' ],[ '1st', '2nd', '3rd' ],]);$keys = collect(['custom_key_name_1', 'custom_key_name_2', 'custom_key_name_3']);$result = $collection->map(fn ($v) => $keys->combine($v));dump($result);
结果：
Illuminate\Support\Collection^ {#5189#items: array:3 [0 => array:3 ["custom_key_name_1" => "first""custom_key_name_2" => "second""custom_key_name_3" => "third"]1 => array:3 ["custom_key_name_1" => "1""custom_key_name_2" => "2""custom_key_name_3" => "3"]2 => array:3 ["custom_key_name_1" => "1st""custom_key_name_2" => "2nd""custom_key_name_3" => "3rd"]]#escapeWhenCastingToString: false}
需要注意的重要事项是，根据文档，如果键和值的元素数量不匹配，将会引发"ValueError"错误。
英文:
Since you're working with a collection of arrays, you can use PHP's array_combine() method to put the keys and values together:
$collection = collect([[ 'first', 'second', 'third' ],[ '1', '2', '3' ],[ '1st', '2nd', '3rd' ],]);$keys = collect(['custom_key_name_1', 'custom_key_name_2', 'custom_key_name_3']);$result = $collection->map(fn ($v) => $keys->combine($v));dump($result);
Result:
Illuminate\Support\Collection^ {#5189#items: array:3 [0 => array:3 ["custom_key_name_1" => "first""custom_key_name_2" => "second""custom_key_name_3" => "third"]1 => array:3 ["custom_key_name_1" => "1""custom_key_name_2" => "2""custom_key_name_3" => "3"]2 => array:3 ["custom_key_name_1" => "1st""custom_key_name_2" => "2nd""custom_key_name_3" => "3rd"]]#escapeWhenCastingToString: false}
The important caveat being that, per the documentation, "a ValueError is thrown if the number of elements in keys and values does not match."
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