Laravel 5.3中的concat集合

Question

I'm trying to concatenate a set collection to another set of collection. I see in Laravel 5.5 it has concat function, but for compatibility reason I have to use until Laravel 5.3 only.

I tried merge function but it is not concatenating but merging instead.

What are other workaround, or how can I update the Laravel Collection without update the whole Laravel package?

Answer 1

You can add functionality to Illuminate\\Support\\Collection via "macro"s if you want to:

\Illuminate\Support\Collection::macro('concat', function ($source) {
    $result = new static($this);

    foreach ($source as $item) {
        $result->push($item);
    }

    return $result;
});

$new = $someCollection->concat($otherOne);

Copied the method from 5.5.

I have a short blog post about macros in Laravel in general, if it helps:

asklagbox blog - Laravel macros

Laravel 5.5 Docs - Collections - Extending Collections Though this is from 5.5 docs Collection has had this macro functionality for awhile now.

Answer 2

Okay nevermind, I'm using code below as workaround,

$first_collection->each(function($element) use (&$second_collection) {

 $second_collection->push($element);

});