PHP code example of jtl / php-generic-collection

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

jtl / php-generic-collection example snippets

use JTL\Generic\GenericCollection;

class MyItemCollection extends GenericCollection {
    public function __construct()
    {
        parent::__construct(MyItem::class);
    }
}

$collection = new MyItemCollection();
$item1 = new MyItem(1);
$item2 = new MyItem(2);
$item3 = new MyItem(3);
$itemList = [
    $item1,
    $item2,
    $item3
];

$collection[] = $item1;
$collection->addItemList([$item2, $item3]);

$collection2 = MyItemCollection::from($item1, $item2, $item3);
$collection3 = MyItemCollection::from(...$itemList);

$collection = new ObjectCollection(MyItem::class);
$item1 = new MyItem(1);
$item2 = new MyItem(2);
$item3 = new MyItem(3);
$itemList = [
    $item1,
    $item2,
    $item3
];

$collection[] = $item1;
$collection->addItemList([$item2, $item3]);

$collection2 = ObjectCollection::from($item1, $item2, $item3);
$collection3 = ObjectCollection::from(...$itemList);

$collection = new ObjectCollection(MyItem::class);
$item1 = new MyItem(1);
$item2 = 'not MyItem';
$item3 = new MyItem(3);

$collection[] = $item1;
$collection[] = $item2; // <- Doesn't work. This will throw an exception + PHPStan will report the error
$collection->addItemList([$item2, $item3]); // <- This won't work either because $item2 is not a 'MyItem'

use JTL\Generic\GenericCollection;

class EvenCollection extends GenericCollection {
    public function checkType($item): bool {
        return $item % 2 === 0;
    }
}

$e = new EvenCollection();
$e[] = 2;
$e[] = 4;
$e[] = 5; // <- Doesn't work. This will throw an exception

$itemList1 = new ItemCollection();
$itemList2 = new ItemCollection();
 
$item11 = new Item('123');
$item12 = new Item('789');
 
$item21 = new Item('456');
$item22 = new Item('0');
 
$itemList1[] = $item11;
$itemList1[] = $item12;
 
$itemList2[] = $item21;
$itemList2[] = $item21;
 
$zip = $itemList1->zip($itemList2);
 
foreach ($zip as $tuple) {
    echo $tuple->getLeft()->getContent() . $tuple->getRight()->getContent() . "\n";
}
 
// Output:
123456
7890

[$unzippedItemList1, $unzippedItemList2] = $zip->unzip();