Method removeNullColumns

lib/Datasource/LocalSpreadsheet.php:219–230

(array $data)

	}

	private function removeNullColumns(array $data): array {
		// Transpose the data to work with columns as rows
		$transposedData = array_map(null, ...$data);

		// Filter out columns that contain only null values
		$filteredData = array_filter($transposedData, function ($column) {
			return !$this->containsOnlyNull($column);
		});

		// Transpose back to original row-column structure
		return array_map(null, ...$filteredData);
	}

	/**
	 * @param $array