Piwik\DataTable\Row::isEqual PHP Méthode

    public static function isEqual(Row $row1, Row $row2)
    {
        //same columns
        $cols1 = $row1->getColumns();
        $cols2 = $row2->getColumns();
        $diff1 = array_udiff($cols1, $cols2, array(__CLASS__, 'compareElements'));
        $diff2 = array_udiff($cols2, $cols1, array(__CLASS__, 'compareElements'));
        if ($diff1 != $diff2) {
            return false;
        }
        $dets1 = $row1->getMetadata();
        $dets2 = $row2->getMetadata();
        ksort($dets1);
        ksort($dets2);
        if ($dets1 != $dets2) {
            return false;
        }
        // either both are null
        // or both have a value
        if (!(is_null($row1->getIdSubDataTable()) && is_null($row2->getIdSubDataTable()))) {
            $subtable1 = $row1->getSubtable();
            $subtable2 = $row2->getSubtable();
            if (!DataTable::isEqual($subtable1, $subtable2)) {
                return false;
            }
        }
        return true;
    }

 public function testWhenRowsInRandomOrderButSortSpecifiedShouldComputeSummaryRowAfterSort()
 {
     $table = new DataTable();
     $table->addRow($this->getRow3());
     $table->addRow($this->getRow2());
     $table->addRow($this->getRow4());
     $table->addRow($this->getRow1());
     $table->addRow($this->getRow0());
     $filter = new Truncate($table, 2, DataTable::LABEL_SUMMARY_ROW, $columnToSortBy = 'nb');
     $filter->filter($table);
     $this->assertEquals(3, $table->getRowsCount());
     $expectedRow = new Row(array(Row::COLUMNS => array('label' => DataTable::LABEL_SUMMARY_ROW, 'nb' => 111)));
     $this->assertTrue(Row::isEqual($table->getLastRow(), $expectedRow));
 }