[5.4] Create a new "every" method on the collection

[JosephSilber]

Creates a new every method, to check if all items in the collection pass a given test:

$ages = collect([['age' => 18], ['age' => 20], ['age' => 24]]);

$allAdult = $ages->every(function ($item) {
    return $item['age'] >= 18;
});

You can also pass it a single argument as a key:

$allActive = $users->every('active');

You can also pass it a key, operator & value, like you would for the where method:

$ages = collect([['age' => 18], ['age' => 20], ['age' => 24]]);

$allAdult = $ages->every('age', '>=', 18);

Also works with the higher order method proxies:

$allSubscribed = $users->every->isSubscribed();

---

There was an existing infrequently-used method by the name every. I've renamed it to nth, to match lodash (not quite the same) and CSS :nth-child (almost the exact same).

[vlakoff]

I think the name is confusing. How about allPass for example?

[JosephSilber]

This is the standard name used by JavaScript ES5, Underscore & Lodash.

[adamwathan]

Makes me want to add an any alias for contains almost, fully support renaming the existing every method too.