How to access the nth object in a Laravel collection object?

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予麋鹿
予麋鹿 2021-01-01 12:38

I have a laravel collection object.

I want to use the nth model within it.

How do I access it?

Edit:

I cannot find a suitable method in the l

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  • 2021-01-01 13:18

    @Phil's answer doesn't quite obtain the nth element, since the keys may be unordered. If you've got an eloquent collection from a db query it'll work fine, but if your keys aren't sequential then you'll need to do something different.

    $collection = collect([0 => 'bish', 2 => 'bash']); $collection[1] // Undefined index

    Instead we can do $collection->values()[1] // string(4) bash which uses array_values()

    Or even make a macro to do this:

    Collection::macro('nthElement', function($offset, $default = null) {
        return $this->values()->get($offset, $default);
    }):
    

    Example macro usage:

    $collection = collect([0 => 'bish', 2 => 'bash']);
    $collection->nthElement(1) // string(4) 'bash'
    $collection->nthElement(3) // undefined index
    $collection->nthElement(3, 'bosh') // string (4) bosh
    
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  • 2021-01-01 13:29

    Seeing as Illuminate\Support\Collection implements ArrayAccess, you should be able to simply use square-bracket notation, ie

    $collection[$nth]
    

    This calls offsetGet internally which you can also use

    $collection->offsetGet($nth)
    

    and finally, you can use the get method which allows for an optional default value

    $collection->get($nth)
    // or
    $collection->get($nth, 'some default value')
    
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  • 2021-01-01 13:33

    If you are having problems with the collection keeping the indices after sorting... you can make a new collection out of the values of that collection and try accessing the newly indexed collection like you would expect:

    e.g. Get the second highest priced item in a collection

    $items = collect(
                     [
                      "1" => ["name" => "baseball", "price" => 5],
                      "2" => ["name"=> "bat", "price" => 15],
                      "3" => ["name" => "glove", "price" => 10]
                     ]
                    );
    
    collect($items->sortByDesc("price")->values())[1]["name"];
    
    // Result: glove
    

    Similar to morphs answer but not the same. Simply using values() after a sort will not give you the expected results because the indices remain coupled to each item.

    Credit to @howtomakeaturn for this solution on the Laravel Github: https://github.com/laravel/framework/issues/1335

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