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[FEATURE] Iterator Diff ViewHelper #988

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Feb 25, 2016
Merged

[FEATURE] Iterator Diff ViewHelper #988

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52 changes: 52 additions & 0 deletions Classes/ViewHelpers/Iterator/DiffViewHelper.php
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<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Iterator;

/*
* This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
*
* For the full copyright and license information, please read the
* LICENSE.md file that was distributed with this source code.
*/

use FluidTYPO3\Vhs\Traits\ArrayConsumingViewHelperTrait;
use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;

/**
* Computes the difference of arrays
*
* @author Thomas Deuling <typo3@coding.ms>, coding.ms
* @package Vhs
* @subpackage ViewHelpers\Iterator
*/
class DiffViewHelper extends AbstractViewHelper {

use ArrayConsumingViewHelperTrait;

/**
* Initialize
*
* @return void
*/
public function initializeArguments() {
parent::initializeArguments();

$this->registerArgument('a', 'mixed', 'First Array/Traversable/CSV', FALSE, NULL);
$this->registerArgument('b', 'mixed', 'Second Array/Traversable/CSV', TRUE);
}

/**
* @return array
*/
public function render() {
$a = $this->arguments['a'];
if (NULL === $a) {
$a = $this->renderChildren();
}

$a = $this->arrayFromArrayOrTraversableOrCSV($a);
$b = $this->arrayFromArrayOrTraversableOrCSV($this->arguments['b']);

return array_diff($a, $b);
}

}