Laravel - collection's keyBy function() to arrange records by one the keys

keyBy-function-on-collection.md

I found the solution with the function keyBy() on the collection (using laravel 5.1, 5.2)

 $collection = $collection->keyBy('id');

If you want to forget an item of your collection it unsets the right one then use following.

$collection->forget($item->id);

Thanks! :) Good to know is that you can pass a function as a parameter to keyBy to determine the key value:

items()->get()->keyBy(function ($item) {
    return $item->field->whatever; // index the collection by a specific sub-field value
});