[4.2] Support/Array : add Arr class

[lucasmichot]

Move array_* functions from helpers.php to new Arr class.
(just following the way it has been done for string functions in Str class)

[Anahkiasen]

👍

[crynobone]

#3537 was turned down. Might want to better describe the need for this.

[Anahkiasen]

It was closed but honestly I'm not sure why as this had been agreed upon previously.

[barryvdh]

👍
But perhaps import the class with use Illuminate\Support\Arr;, so you can use the short class in the helpers?

[lucasmichot]

Good catch @barryvdh , squashed and commited

[barryvdh]

Oh I see now that the Str classes also didn't do that (don't know why).

But cool, I don't think the Laravel core should be dependent on all those helpers.

[lucasmichot]

Just opened a PR for that @barryvdh #4635 ;)

[KennedyTedesco]

I really like this. 👍

[JosephSilber]

@crynobone one advantage to using a class would be for splitting a complex function into multiple methods.

See this thread for an example.

[JosephSilber]

CLosure typo there.

[taylorotwell]

Can you look at the merge conflicts on this?

[lucasmichot]

Done and squashed @taylorotwell

[GrahamCampbell]

That commit name is pretty bad...

[lucasmichot]

@taylorotwell , is everything good for this PR ?