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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace PeServer\Core\Collection; |
| 6 | |
| 7 | use AppendIterator; |
| 8 | use ArrayIterator; |
| 9 | use CallbackFilterIterator; |
| 10 | use Countable; |
| 11 | use EmptyIterator; |
| 12 | use Iterator; |
| 13 | use IteratorAggregate; |
| 14 | use LimitIterator; |
| 15 | use Traversable; |
| 16 | use PeServer\Core\Collection\Arr; |
| 17 | use PeServer\Core\Throws\ArgumentException; |
| 18 | use PeServer\Core\Throws\InvalidOperationException; |
| 19 | use PeServer\Core\TypeUtility; |
| 20 | |
| 21 | /** |
| 22 | * イテレータを使用したコレクション処理(LINQしたいのだ)。 |
| 23 | * |
| 24 | * 実行速度ではなく、開発効率を目標としている。 |
| 25 | * |
| 26 | * @template TKey of array-key |
| 27 | * @template TValue |
| 28 | * @phpstan-type PredicateAlias callable(TValue,TKey):(bool) |
| 29 | * @implements IteratorAggregate<TKey,TValue> |
| 30 | */ |
| 31 | class Collections implements IteratorAggregate |
| 32 | { |
| 33 | /** |
| 34 | * 生成。 |
| 35 | * |
| 36 | * @param Iterator $iterator |
| 37 | * @phpstan-param Iterator<TKey,TValue> $iterator |
| 38 | */ |
| 39 | private function __construct( |
| 40 | private Iterator $iterator |
| 41 | ) { |
| 42 | } |
| 43 | |
| 44 | #region function |
| 45 | |
| 46 | /** |
| 47 | * イテレータから生成。 |
| 48 | * |
| 49 | * @template TCreateKey of array-key |
| 50 | * @template TCreateValue |
| 51 | * @param Iterator $iterator |
| 52 | * @phpstan-param Iterator<TCreateKey,TCreateValue> $iterator |
| 53 | * @return self |
| 54 | * @phpstan-return self<TCreateKey,TCreateValue> |
| 55 | */ |
| 56 | private static function create(Iterator $iterator): self |
| 57 | { |
| 58 | return new self($iterator); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * ジェネレータから生成。 |
| 63 | * |
| 64 | * @template TWrapKey of array-key |
| 65 | * @template TWrapValue |
| 66 | * @param callable $generatorFactory |
| 67 | * @phpstan-param callable():\Generator<TWrapKey,TWrapValue> $generatorFactory |
| 68 | * @return self |
| 69 | * @phpstan-return self<TWrapKey,TWrapValue> |
| 70 | */ |
| 71 | private static function wrap(callable $generatorFactory): self |
| 72 | { |
| 73 | return self::create(TraverseUtility::toIterator($generatorFactory)); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * @phpstan-return Traversable<TKey,TValue> |
| 78 | */ |
| 79 | public function getIterator(): Traversable |
| 80 | { |
| 81 | return $this->iterator; |
| 82 | } |
| 83 | |
| 84 | #region 開始 |
| 85 | |
| 86 | /** |
| 87 | * 配列からコレクション生成。 |
| 88 | * |
| 89 | * @template TFromKey of array-key |
| 90 | * @template TFromValue |
| 91 | * @param Traversable|array<mixed>|callable $sequence |
| 92 | * @phpstan-param Traversable<TFromKey,TFromValue>|array<TFromKey,TFromValue>|callable():(\Generator<TFromKey,TFromValue>) $sequence |
| 93 | * @return self |
| 94 | * @phpstan-return self<TFromKey,TFromValue> |
| 95 | */ |
| 96 | public static function from(Traversable|array|callable $sequence): self |
| 97 | { |
| 98 | return self::create(TraverseUtility::toIterator($sequence)); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * 指定した範囲内の整数からコレクション生成。 |
| 103 | * |
| 104 | * @param int $start 開始。 |
| 105 | * @param int $count 件数。 |
| 106 | * @phpstan-param non-negative-int $count |
| 107 | * @return self |
| 108 | * @phpstan-return self<non-negative-int,int> |
| 109 | */ |
| 110 | public static function range(int $start, int $count): self |
| 111 | { |
| 112 | $iterator = new RangeIterator($start, $count); |
| 113 | /** @phpstan-var self<non-negative-int,int> */ |
| 114 | return self::create($iterator); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * 繰り返されるコレクション生成。 |
| 119 | * |
| 120 | * @template TRepeatValue |
| 121 | * @param mixed $value 値。 |
| 122 | * @phpstan-param TRepeatValue $value |
| 123 | * @param int $count 件数。 |
| 124 | * @phpstan-param non-negative-int $count |
| 125 | * @return self |
| 126 | * @phpstan-return self<non-negative-int,TRepeatValue> |
| 127 | */ |
| 128 | public static function repeat(mixed $value, int $count): self |
| 129 | { |
| 130 | $iterator = new RepeatIterator($value, $count); |
| 131 | /** @phpstan-var self<non-negative-int,TRepeatValue> */ |
| 132 | return self::create($iterator); |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * 空のコレクション。 |
| 137 | * |
| 138 | * @return self |
| 139 | * @phpstan-return self<TKey,TValue> |
| 140 | */ |
| 141 | public static function empty(): self |
| 142 | { |
| 143 | return self::create(new EmptyIterator()); |
| 144 | } |
| 145 | |
| 146 | #endregion |
| 147 | |
| 148 | #region 実体化 |
| 149 | |
| 150 | /** |
| 151 | * 配列実体化。 |
| 152 | * |
| 153 | * @return array<mixed> |
| 154 | * @phpstan-return array<array-key,TValue> |
| 155 | */ |
| 156 | public function toArray(): array |
| 157 | { |
| 158 | return TraverseUtility::toArray($this->iterator, false); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * リスト実体化。 |
| 163 | * |
| 164 | * `Enumerable.ToList<TSource>` 的な。 |
| 165 | * |
| 166 | * @param class-string|TypeUtility::TYPE_* $type |
| 167 | * @return Vector |
| 168 | * @phpstan-return Vector<TValue> |
| 169 | */ |
| 170 | public function toList(string $type = TypeUtility::TYPE_NULL): Vector |
| 171 | { |
| 172 | $array = self::toArray(); |
| 173 | if (Arr::isNullOrEmpty($array)) { |
| 174 | return Vector::empty($type); |
| 175 | } |
| 176 | /** @phpstan-var non-empty-array<TValue> $array */ |
| 177 | |
| 178 | return Vector::create($array, true); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * 辞書実体化。 |
| 183 | * |
| 184 | * @template TResult |
| 185 | * @param callable $keyFactory 第1引数:値, 第1引数:キー(文字列変換済み), 戻り値:キー(文字列)。 |
| 186 | * @phpstan-param callable(TValue,TKey):string $keyFactory |
| 187 | * @param callable $valueFactory 第1引数:値, 第1引数:キー(文字列変換済み), 戻り値:値。 |
| 188 | * @phpstan-param callable(TValue,TKey):TResult $valueFactory |
| 189 | * @param class-string|TypeUtility::TYPE_* $type |
| 190 | * @return Dictionary |
| 191 | * @phpstan-return Dictionary<TResult> |
| 192 | */ |
| 193 | public function toDictionary(callable $keyFactory, callable $valueFactory, string $type = TypeUtility::TYPE_NULL): Dictionary |
| 194 | { |
| 195 | /** @phpstan-var array<string,TResult> */ |
| 196 | $buffer = []; |
| 197 | |
| 198 | foreach ($this->iterator as $key => $value) { |
| 199 | $convertedKey = $key; |
| 200 | if (!is_string($key)) { |
| 201 | $convertedKey = TypeUtility::toString($key); |
| 202 | } |
| 203 | |
| 204 | $k = call_user_func($keyFactory, $value, $convertedKey); |
| 205 | $v = call_user_func($valueFactory, $value, $convertedKey); |
| 206 | |
| 207 | if (isset($buffer[$k])) { |
| 208 | throw new ArgumentException($k); |
| 209 | } |
| 210 | |
| 211 | $buffer[$k] = $v; |
| 212 | } |
| 213 | |
| 214 | if (Arr::isNullOrEmpty($buffer)) { |
| 215 | return Dictionary::empty($type); |
| 216 | } |
| 217 | /** @phpstan-var non-empty-array<string,TResult> $buffer */ |
| 218 | |
| 219 | return Dictionary::create($buffer); |
| 220 | } |
| 221 | |
| 222 | #endregion |
| 223 | |
| 224 | #region 処理 |
| 225 | |
| 226 | /** |
| 227 | * [遅延] フィルタリング |
| 228 | * |
| 229 | * @param callable $callback 値, キー: 条件を満たすか |
| 230 | * @phpstan-param PredicateAlias $callback |
| 231 | * @return self |
| 232 | * @phpstan-return self<TKey,TValue> |
| 233 | */ |
| 234 | public function where(callable $callback): self |
| 235 | { |
| 236 | $iterator = new CallbackFilterIterator($this->iterator, $callback); |
| 237 | return self::create($iterator); |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * [遅延] 射影。 |
| 242 | * |
| 243 | * @template TResult |
| 244 | * @param callable $callback |
| 245 | * @phpstan-param callable(TValue,TKey):(TResult) $callback |
| 246 | * @return self |
| 247 | * @phpstan-return self<TKey,TResult> |
| 248 | */ |
| 249 | public function select(callable $callback): self |
| 250 | { |
| 251 | $selectIterator = new SelectIterator($this->iterator, $callback); |
| 252 | return self::create($selectIterator); |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * [遅延] 射影-平坦化。 |
| 257 | * |
| 258 | * @template TResult |
| 259 | * @param callable $callback |
| 260 | * @phpstan-param callable(TValue,TKey):(TResult) $callback |
| 261 | * @return self |
| 262 | * @phpstan-return self<TKey,TResult> |
| 263 | */ |
| 264 | public function selectMany(callable $callback): self |
| 265 | { |
| 266 | //@phpstan-ignore-next-line |
| 267 | $selectIterator = new SelectManyIterator($this->iterator, $callback); |
| 268 | return new self($selectIterator); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | /** |
| 273 | * [遅延] 末尾に連結。 |
| 274 | * |
| 275 | * @param Traversable|array<mixed>|callable $sequence |
| 276 | * @phpstan-param Traversable<TKey,TValue>|array<TKey,TValue>|callable():\Generator<TKey,TValue> $sequence |
| 277 | * @return self |
| 278 | * @phpstan-return self<TKey,TValue> |
| 279 | */ |
| 280 | public function concat(Traversable|array|callable $sequence): self |
| 281 | { |
| 282 | $sequenceIterator = TraverseUtility::toIterator($sequence); |
| 283 | |
| 284 | /** @phpstan-var AppendIterator<TKey,TValue,Iterator<TKey,TValue>> */ |
| 285 | $appendIterator = new AppendIterator(); |
| 286 | $appendIterator->append($this->iterator); |
| 287 | $appendIterator->append($sequenceIterator); |
| 288 | |
| 289 | return self::create($appendIterator); |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * [遅延] 要素を先頭追加。 |
| 294 | * |
| 295 | * @param mixed $value |
| 296 | * @phpstan-param TValue $value |
| 297 | * @return self |
| 298 | * @phpstan-return self<TKey,TValue> |
| 299 | */ |
| 300 | public function prepend(mixed $value): self |
| 301 | { |
| 302 | $valueIterator = TraverseUtility::toIterator([$value]); |
| 303 | |
| 304 | /** @phpstan-var AppendIterator<TKey,TValue,Iterator<TKey,TValue>> */ |
| 305 | $appendIterator = new AppendIterator(); |
| 306 | $appendIterator->append($valueIterator); |
| 307 | $appendIterator->append($this->iterator); |
| 308 | |
| 309 | return self::create($appendIterator); |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * [遅延] 要素を末尾追加。 |
| 314 | * |
| 315 | * @param mixed $value |
| 316 | * @phpstan-param TValue $value |
| 317 | * @return self |
| 318 | * @phpstan-return self<TKey,TValue> |
| 319 | */ |
| 320 | public function append(mixed $value): self |
| 321 | { |
| 322 | $valueIterator = TraverseUtility::toIterator([$value]); |
| 323 | |
| 324 | /** @phpstan-var AppendIterator<TKey,TValue,Iterator<TKey,TValue>> */ |
| 325 | $appendIterator = new AppendIterator(); |
| 326 | $appendIterator->append($this->iterator); |
| 327 | $appendIterator->append($valueIterator); |
| 328 | |
| 329 | return self::create($appendIterator); |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * [即時] 要素が含まれているか。 |
| 334 | * |
| 335 | * @param callable|null $callback 非nullの場合条件指定。 |
| 336 | * @phpstan-param PredicateAlias|null $callback |
| 337 | * @return boolean |
| 338 | */ |
| 339 | public function any(?callable $callback = null): bool |
| 340 | { |
| 341 | if ($callback === null) { |
| 342 | $this->iterator->rewind(); |
| 343 | return $this->iterator->valid(); |
| 344 | } |
| 345 | |
| 346 | foreach ($this->iterator as $key => $value) { |
| 347 | if ($callback($value, $key)) { |
| 348 | return true; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | return false; |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * [即時] 全ての要素が条件を満たすか。 |
| 357 | * |
| 358 | * @param callable $callback |
| 359 | * @phpstan-param PredicateAlias $callback |
| 360 | * @return boolean |
| 361 | */ |
| 362 | public function all(callable $callback): bool |
| 363 | { |
| 364 | foreach ($this->iterator as $key => $value) { |
| 365 | if (!$callback($value, $key)) { |
| 366 | return false; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | return true; |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * [即時] 件数を取得。 |
| 375 | * |
| 376 | * @param callable|null $callback 非nullの場合条件指定。 |
| 377 | * @phpstan-param PredicateAlias|null $callback |
| 378 | * @return int |
| 379 | */ |
| 380 | public function count(callable $callback = null): int |
| 381 | { |
| 382 | if ($callback === null) { |
| 383 | if ($this->iterator instanceof Countable) { |
| 384 | return $this->iterator->count(); |
| 385 | } |
| 386 | |
| 387 | return iterator_count($this->iterator); |
| 388 | } |
| 389 | |
| 390 | $count = 0; |
| 391 | $this->iterator->rewind(); |
| 392 | while ($this->iterator->valid()) { |
| 393 | if ($callback($this->iterator->current(), $this->iterator->key())) { |
| 394 | $count += 1; |
| 395 | } |
| 396 | $this->iterator->next(); |
| 397 | } |
| 398 | |
| 399 | return $count; |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * [即時] 先頭要素を取得。 |
| 404 | * |
| 405 | * @param callable|null $callback 非nullの場合条件指定。 |
| 406 | * @phpstan-param PredicateAlias|null $callback |
| 407 | * @return mixed |
| 408 | * @phpstan-return TValue |
| 409 | * @throws InvalidOperationException 要素なし。 |
| 410 | */ |
| 411 | public function first(?callable $callback = null): mixed |
| 412 | { |
| 413 | if ($callback === null) { |
| 414 | foreach ($this->iterator as $key => $value) { |
| 415 | return $value; |
| 416 | } |
| 417 | } else { |
| 418 | foreach ($this->iterator as $key => $value) { |
| 419 | if ($callback($value, $key)) { |
| 420 | return $value; |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | throw new InvalidOperationException(); |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * [即時] 先頭要素を取得、存在しない場合は指定値を返す。 |
| 430 | * |
| 431 | * @param mixed $notFound 存在しない場合の戻り値。 |
| 432 | * @phpstan-param TValue $notFound |
| 433 | * @param callable|null $callback 非nullの場合条件指定。 |
| 434 | * @phpstan-param PredicateAlias|null $callback |
| 435 | * @return mixed |
| 436 | * @phpstan-return TValue |
| 437 | */ |
| 438 | public function firstOr(mixed $notFound, ?callable $callback = null): mixed |
| 439 | { |
| 440 | if ($callback === null) { |
| 441 | foreach ($this->iterator as $key => $value) { |
| 442 | return $value; |
| 443 | } |
| 444 | } else { |
| 445 | foreach ($this->iterator as $key => $value) { |
| 446 | if ($callback($value, $key)) { |
| 447 | return $value; |
| 448 | } |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | return $notFound; |
| 453 | } |
| 454 | |
| 455 | /** |
| 456 | * [即時] 終端要素を取得。 |
| 457 | * |
| 458 | * @param callable|null $callback 非nullの場合条件指定。 |
| 459 | * @phpstan-param PredicateAlias|null $callback |
| 460 | * @return mixed |
| 461 | * @phpstan-return TValue |
| 462 | * @throws InvalidOperationException 要素なし。 |
| 463 | */ |
| 464 | public function last(?callable $callback = null): mixed |
| 465 | { |
| 466 | $isFound = false; |
| 467 | /** @phpstan-var TValue */ |
| 468 | $current = null; |
| 469 | |
| 470 | if ($callback === null) { |
| 471 | foreach ($this->iterator as $key => $value) { |
| 472 | $isFound = true; |
| 473 | $current = $value; |
| 474 | } |
| 475 | } else { |
| 476 | foreach ($this->iterator as $key => $value) { |
| 477 | if ($callback($value, $key)) { |
| 478 | $isFound = true; |
| 479 | $current = $value; |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | if ($isFound) { |
| 485 | return $current; |
| 486 | } |
| 487 | |
| 488 | throw new InvalidOperationException(); |
| 489 | } |
| 490 | |
| 491 | /** |
| 492 | * [即時] 終端要素を取得、存在しない場合は指定値を返す。 |
| 493 | * |
| 494 | * @param mixed $notFound 存在しない場合の戻り値。 |
| 495 | * @phpstan-param TValue $notFound |
| 496 | * @param callable|null $callback 非nullの場合条件指定。 |
| 497 | * @phpstan-param PredicateAlias|null $callback |
| 498 | * @return mixed |
| 499 | * @phpstan-return TValue |
| 500 | * @throws InvalidOperationException 要素なし。 |
| 501 | */ |
| 502 | public function lastOr(mixed $notFound, ?callable $callback = null): mixed |
| 503 | { |
| 504 | $isFound = false; |
| 505 | /** @phpstan-var TValue */ |
| 506 | $current = null; |
| 507 | |
| 508 | if ($callback === null) { |
| 509 | foreach ($this->iterator as $key => $value) { |
| 510 | $isFound = true; |
| 511 | $current = $value; |
| 512 | } |
| 513 | } else { |
| 514 | foreach ($this->iterator as $key => $value) { |
| 515 | if ($callback($value, $key)) { |
| 516 | $isFound = true; |
| 517 | $current = $value; |
| 518 | } |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | if ($isFound) { |
| 523 | return $current; |
| 524 | } |
| 525 | |
| 526 | return $notFound; |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * [即時] 単独の要素取得。 |
| 531 | * |
| 532 | * @param callable|null $callback 非nullの場合条件指定。 |
| 533 | * @phpstan-param PredicateAlias|null $callback |
| 534 | * @return mixed |
| 535 | * @phpstan-return TValue |
| 536 | * @throws InvalidOperationException 要素なし/複数あり。 |
| 537 | */ |
| 538 | public function single(?callable $callback = null): mixed |
| 539 | { |
| 540 | $isFound = false; |
| 541 | /** @phpstan-var TValue */ |
| 542 | $current = null; |
| 543 | |
| 544 | if ($callback === null) { |
| 545 | foreach ($this->iterator as $key => $value) { |
| 546 | if ($isFound) { |
| 547 | throw new InvalidOperationException(); |
| 548 | } |
| 549 | $isFound = true; |
| 550 | $current = $value; |
| 551 | } |
| 552 | } else { |
| 553 | foreach ($this->iterator as $key => $value) { |
| 554 | if ($callback($value, $key)) { |
| 555 | if ($isFound) { |
| 556 | throw new InvalidOperationException(); |
| 557 | } |
| 558 | $isFound = true; |
| 559 | $current = $value; |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | if ($isFound) { |
| 565 | return $current; |
| 566 | } |
| 567 | |
| 568 | throw new InvalidOperationException(); |
| 569 | } |
| 570 | |
| 571 | /** |
| 572 | * [即時] 単独の要素取得、存在しない場合は指定値を返す。 |
| 573 | * |
| 574 | * @param mixed $notFound 存在しない場合の戻り値。 |
| 575 | * @phpstan-param TValue $notFound |
| 576 | * @param callable|null $callback 非nullの場合条件指定。 |
| 577 | * @phpstan-param PredicateAlias|null $callback |
| 578 | * @return mixed |
| 579 | * @phpstan-return TValue |
| 580 | * @throws InvalidOperationException 複数あり。 |
| 581 | */ |
| 582 | public function singleOr(mixed $notFound, ?callable $callback = null): mixed |
| 583 | { |
| 584 | $isFound = false; |
| 585 | /** @phpstan-var TValue */ |
| 586 | $current = null; |
| 587 | |
| 588 | if ($callback === null) { |
| 589 | foreach ($this->iterator as $key => $value) { |
| 590 | if ($isFound) { |
| 591 | throw new InvalidOperationException(); |
| 592 | } |
| 593 | $isFound = true; |
| 594 | $current = $value; |
| 595 | } |
| 596 | } else { |
| 597 | foreach ($this->iterator as $key => $value) { |
| 598 | if ($callback($value, $key)) { |
| 599 | if ($isFound) { |
| 600 | throw new InvalidOperationException(); |
| 601 | } |
| 602 | $isFound = true; |
| 603 | $current = $value; |
| 604 | } |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | if ($isFound) { |
| 609 | return $current; |
| 610 | } |
| 611 | |
| 612 | return $notFound; |
| 613 | } |
| 614 | |
| 615 | /** |
| 616 | * [遅延] 先頭から指定数をバイパス。 |
| 617 | * |
| 618 | * @param int $skipCount |
| 619 | * @phpstan-param non-negative-int $skipCount |
| 620 | * @return self |
| 621 | * @phpstan-return self<TKey,TValue> |
| 622 | */ |
| 623 | public function skip(int $skipCount): self |
| 624 | { |
| 625 | $limitIterator = new LimitIterator($this->iterator, $skipCount); |
| 626 | return self::create($limitIterator); |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * [遅延] 先頭から条件を満たす限りバイパス。 |
| 631 | * |
| 632 | * @param callable $callback |
| 633 | * @phpstan-param PredicateAlias $callback |
| 634 | * @return self |
| 635 | * @phpstan-return self<TKey,TValue> |
| 636 | */ |
| 637 | public function skipWhile(callable $callback): self |
| 638 | { |
| 639 | return self::wrap(function () use ($callback) { |
| 640 | $skipCount = 0; |
| 641 | foreach ($this->iterator as $key => $value) { |
| 642 | if (!$callback($value, $key)) { |
| 643 | foreach ($this->skip($skipCount) as $key => $value) { |
| 644 | yield $key => $value; |
| 645 | } |
| 646 | } |
| 647 | $skipCount += 1; |
| 648 | } |
| 649 | |
| 650 | return self::empty(); |
| 651 | }); |
| 652 | } |
| 653 | |
| 654 | /** |
| 655 | * [遅延] 先頭から指定された件数を返却。 |
| 656 | * |
| 657 | * @param int $takeCount |
| 658 | * @phpstan-param non-negative-int $takeCount |
| 659 | * @return self |
| 660 | * @phpstan-return self<TKey,TValue> |
| 661 | */ |
| 662 | public function take(int $takeCount): self |
| 663 | { |
| 664 | return self::create(new TakeIterator($this->iterator, $takeCount)); |
| 665 | } |
| 666 | |
| 667 | /** |
| 668 | * [遅延] 先頭から条件を満たすデータを返却。 |
| 669 | * |
| 670 | * @param callable $callback |
| 671 | * @phpstan-param PredicateAlias $callback |
| 672 | * @return self |
| 673 | * @phpstan-return self<TKey,TValue> |
| 674 | */ |
| 675 | public function takeWhile(callable $callback): self |
| 676 | { |
| 677 | return self::create(new TakeWhileIterator($this->iterator, $callback)); |
| 678 | } |
| 679 | |
| 680 | /** |
| 681 | * [遅延] 反転。 |
| 682 | * |
| 683 | * @return self |
| 684 | * @phpstan-return self<TKey,TValue> |
| 685 | */ |
| 686 | public function reverse(): self |
| 687 | { |
| 688 | return self::wrap(function () { |
| 689 | $cache = []; |
| 690 | foreach ($this->iterator as $key => $value) { |
| 691 | $cache[] = [$key, $value]; |
| 692 | } |
| 693 | $count = count($cache); |
| 694 | for ($i = $count - 1; $i >= 0; $i--) { |
| 695 | yield $cache[$i][0] => $cache[$i][1]; |
| 696 | } |
| 697 | }); |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * [即時] 集計。 |
| 702 | * |
| 703 | * @param callable $callback |
| 704 | * @phpstan-param callable(TValue $result,TValue,TKey):(TValue) $callback |
| 705 | * @param mixed $initial |
| 706 | * @phpstan-param TValue $initial |
| 707 | * @phpstan-return TValue |
| 708 | */ |
| 709 | public function aggregate(callable $callback, mixed $initial = 0): mixed |
| 710 | { |
| 711 | $result = $initial; |
| 712 | |
| 713 | foreach ($this->iterator as $key => $value) { |
| 714 | $result = $callback($result, $value, $key); |
| 715 | } |
| 716 | |
| 717 | return $result; |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * [即時] 最大データの取得。 |
| 722 | * |
| 723 | * @param callable|null $callback |
| 724 | * @phpstan-param callable(TValue, TKey): TValue|null $callback |
| 725 | * @return mixed |
| 726 | * @phpstan-return TValue|null |
| 727 | */ |
| 728 | public function max(callable $callback = null): mixed |
| 729 | { |
| 730 | /** @phpstan-var TValue|null */ |
| 731 | $result = PHP_INT_MIN; |
| 732 | |
| 733 | if ($callback === null) { |
| 734 | foreach ($this->iterator as $key => $value) { |
| 735 | if ($result < $value) { |
| 736 | $result = $value; |
| 737 | } |
| 738 | } |
| 739 | } else { |
| 740 | foreach ($this->iterator as $key => $value) { |
| 741 | $ret = $callback($value, $key); |
| 742 | if ($result < $ret) { |
| 743 | $result = $ret; |
| 744 | } |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | return $result; |
| 749 | } |
| 750 | |
| 751 | /** |
| 752 | * [即時] 最小データの取得。 |
| 753 | * |
| 754 | * @param callable|null $callback |
| 755 | * @phpstan-param callable(TValue, TKey): TValue|null $callback |
| 756 | * @return mixed |
| 757 | * @phpstan-return TValue|null |
| 758 | */ |
| 759 | public function min(callable $callback = null): mixed |
| 760 | { |
| 761 | /** @phpstan-var TValue|null */ |
| 762 | $result = PHP_INT_MAX; |
| 763 | |
| 764 | if ($callback === null) { |
| 765 | foreach ($this->iterator as $key => $value) { |
| 766 | if ($value < $result) { |
| 767 | $result = $value; |
| 768 | } |
| 769 | } |
| 770 | } else { |
| 771 | foreach ($this->iterator as $key => $value) { |
| 772 | $ret = $callback($value, $key); |
| 773 | if ($result < $ret) { |
| 774 | $result = $ret; |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | return $result; |
| 780 | } |
| 781 | |
| 782 | /** |
| 783 | * [遅延] zip |
| 784 | * |
| 785 | * @template TSequenceKey of array-key |
| 786 | * @template TSequenceValue |
| 787 | * @template TResult |
| 788 | * @param Traversable|array|callable $sequence |
| 789 | * @phpstan-param Traversable<TSequenceKey,TSequenceValue>|array<TSequenceKey,TSequenceValue>|callable():\Generator<TSequenceKey,TSequenceValue> $sequence |
| 790 | * @param callable $callback |
| 791 | * @phpstan-param callable(array{0:TValue,1:TSequenceValue},TKey):(TResult) $callback |
| 792 | * @return self |
| 793 | * @phpstan-return self<array-key,TResult> |
| 794 | */ |
| 795 | public function zip(Traversable|array|callable $sequence, callable $callback): self |
| 796 | { |
| 797 | $sequenceIterator = TraverseUtility::toIterator($sequence); |
| 798 | $iterator = new ZipIterator($this->iterator, $sequenceIterator, $callback); |
| 799 | return self::create($iterator); |
| 800 | } |
| 801 | |
| 802 | #endregion |
| 803 | |
| 804 | #endregion |
| 805 | } |