for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php declare(strict_types=1);
namespace Stratadox\PuzzleSolver\Puzzle\Sudoku;
use Stratadox\PuzzleSolver\Puzzle;
use Stratadox\PuzzleSolver\PuzzleFactory;
use function assert;
use function count;
use function preg_split;
use function str_replace;
final class SudokuFactory implements PuzzleFactory
{
public static function make(): PuzzleFactory
return new self();
}
public function fromString(string $puzzle): Puzzle
$puzzle = str_replace([' ', '|', '+', '-'], '', $puzzle);
$numbers = [];
foreach (preg_split("/(\n)|(\r)/", $puzzle) as $line) {
if (empty($line)) {
continue;
$row = [];
for ($c = 0; $c < 9; $c++) {
if ($line[$c] === '.') {
$row[] = null;
} else {
$row[] = (int) $line[$c];
$numbers[] = $row;
assert(count($numbers) === 9);
return SudokuPuzzle::fromArrays(...$numbers);
Stratadox /
PuzzleSolver
