public function __invoke() : View
{
$extractShorName = function ($item) {
return $item->state->getShortName();
};
$allItems = Item::all();
$newItems = P::pipe(P::filter(P::pipe($extractShorName, P::eq('new'))), 'P::size');
return view('main')->with('items', $allItems)->with('remaining_item_count', $newItems($allItems));
}
public function testFilter()
{
$list1 = function () {
(yield json_decode('{"a": 1, "b":1}'));
(yield json_decode('{"a": 2, "b":2}'));
(yield json_decode('{"a": 3, "b":3}'));
};
$list2 = [json_decode('{"a": 1, "b":1}'), json_decode('{"a": 2, "b":2}'), json_decode('{"a": 3, "b":3}')];
$aIsTwo = function ($item) {
return $item->a == 2 ? TRUE : FALSE;
};
$this->assertEquals([json_decode('{"a": 2, "b":2}')], P::toArray(P::filter($aIsTwo, $list1())));
$this->assertEquals([json_decode('{"a": 2, "b":2}')], P::toArray(P::filter($aIsTwo, $list2)));
$list3 = [1, 2];
$valueIsOne = function ($v) {
return $v === 1 ? TRUE : FALSE;
};
$this->assertEquals(1, P::head(P::filter($valueIsOne, $list3)));
$list4 = ['a' => 1, 'b' => 2];
$valueIsOne = function ($v, $key) {
return $v === 1 ? TRUE : FALSE;
};
$this->assertEquals(['a' => 1], P::head(P::filter($valueIsOne, $list4)));
}
require_once '../ch08/model/User.php';
require_once '../ch08/model/Account.php';
use Model\Account;
use Model\User;
use Rx\Observable;
use Rx\Observer;
// SELECT firstname
// FROM users
// WHERE firstname IS NOT NULL
// ORDER BY firstname DESC
// LIMIT 1;
print_r(P::pipe('\\Model\\User::query', P::map(P::prop('firstname')), P::filter(function ($n) {
return !empty($n);
}), 'P::reverse', P::take(1))());
P::compose(P::take(1), 'P::reverse', P::filter(function ($n) {
return !empty($n);
}), P::map(P::prop('firstname')), '\\Model\\User::query')();
// PHP Warning: f() expects
// at least 2 parameters, 1 given
// $format = P::compose('addExclamation', $repeat(2), 'strtoupper');
// $format('Hello World'); //-> HELLO WORLD HELLO WORLD!
$applyTax = P::curry2(function ($rate, $amount) {
return $amount + $amount * ($rate / 100);
});
$applyTax(6.0);
//-> Closure
$applyTax(6.0, 100);
//-> 106
$applyTax(6.0)(100);
//-> 106
// $total = P::compose($currency('USD'), $applyTax(6.0), 'P::sum');
