How can I sort this Collection using an array order?

Question

How can I sort the $item type based on the order? This is what I currently have:

$order = ['AA', 'zl', 'Dr', 'co', 'og'];

$items->sort(
    function ($a, $b) use ($order) {
        return strcmp($b->type, $a->type) // how do I apply the order here?
            ?: strcmp($b->date, $a->date);
    }
);

Basically it's a two column sort where it first sorts by type and then sorts by date. The type would be sorted using the array order rather than the typical alphabetical order.

Don't Panic · Accepted Answer · 2017-08-01 22:50:14Z

2

You could compare the keys in $order corresponding to the type of each item.

    return ($order[$b->type] - $order[$a->type]) 
           ?: strcmp($b->date, $a->date);

This should work if all of your items have types contained in $order. If not, you'll get undefined index errors which will mess up the sort. But since you haven't specified how items like that should be sorted in your question, I'm assuming that they all do.

edited Aug 1, 2017 at 22:50

answered Aug 1, 2017 at 22:43

Don't Panic

41.9k11 gold badges70 silver badges87 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Howard Over a year ago

Works perfectly. Thank you

Collectives™ on Stack Overflow

How can I sort this Collection using an array order?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related