DusanKasan /
Knapsack
| @@ 235-244 (lines=10) @@ | ||
| 232 | * @param callable $function ($value, $key) |
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| 233 | * @return Collection |
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| 234 | */ |
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| 235 | function map($collection, callable $function) |
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| 236 | { |
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| 237 | $generatorFactory = function () use ($collection, $function) { |
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| 238 | foreach ($collection as $key => $value) { |
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| 239 | yield $key => $function($value, $key); |
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| 240 | } |
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| 241 | }; |
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| 242 | ||
| 243 | return new Collection($generatorFactory); |
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| 244 | } |
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| 245 | ||
| 246 | /** |
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| 247 | * Returns a lazy collection of items from $collection for which $function returns true. |
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| @@ 253-264 (lines=12) @@ | ||
| 250 | * @param callable $function ($value, $key) |
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| 251 | * @return Collection |
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| 252 | */ |
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| 253 | function filter($collection, callable $function) |
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| 254 | { |
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| 255 | $generatorFactory = function () use ($collection, $function) { |
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| 256 | foreach ($collection as $key => $value) { |
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| 257 | if ($function($value, $key)) { |
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| 258 | yield $key => $value; |
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| 259 | } |
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| 260 | } |
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| 261 | }; |
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| 262 | ||
| 263 | return new Collection($generatorFactory); |
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| 264 | } |
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| 265 | ||
| 266 | /** |
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| 267 | * Returns a lazy collection with items from all $collections passed as argument appended together |
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| @@ 449-460 (lines=12) @@ | ||
| 446 | * @param callable $function ($value, $key) |
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| 447 | * @return Collection |
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| 448 | */ |
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| 449 | function each($collection, callable $function) |
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| 450 | { |
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| 451 | $generatorFactory = function () use ($collection, $function) { |
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| 452 | foreach ($collection as $key => $value) { |
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| 453 | $function($value, $key); |
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| 454 | ||
| 455 | yield $key => $value; |
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| 456 | } |
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| 457 | }; |
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| 458 | ||
| 459 | return new Collection($generatorFactory); |
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| 460 | } |
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| 461 | ||
| 462 | /** |
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| 463 | * Returns an item with $key key from $collection. If that key is not present, throws ItemNotFound. |
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| @@ 525-534 (lines=10) @@ | ||
| 522 | * @param callable $function ($value, $key) |
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| 523 | * @return Collection |
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| 524 | */ |
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| 525 | function indexBy($collection, callable $function) |
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| 526 | { |
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| 527 | $generatorFactory = function () use ($collection, $function) { |
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| 528 | foreach ($collection as $key => $value) { |
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| 529 | yield $function($value, $key) => $value; |
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| 530 | } |
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| 531 | }; |
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| 532 | ||
| 533 | return new Collection($generatorFactory); |
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| 534 | } |
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| 535 | ||
| 536 | /** |
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| 537 | * Returns a non-lazy collection of items whose keys are the return values of $function and values are the number of |
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