DusanKasan /
Knapsack
| @@ 234-243 (lines=10) @@ | ||
| 231 | * @param callable $function ($value, $key) |
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| 232 | * @return Collection |
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| 233 | */ |
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| 234 | function map($collection, callable $function) |
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| 235 | { |
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| 236 | $generatorFactory = function () use ($collection, $function) { |
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| 237 | foreach ($collection as $key => $value) { |
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| 238 | yield $key => $function($value, $key); |
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| 239 | } |
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| 240 | }; |
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| 241 | ||
| 242 | return new Collection($generatorFactory); |
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| 243 | } |
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| 244 | ||
| 245 | /** |
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| 246 | * Returns a lazy collection of items from $collection for which $function returns true. |
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| @@ 252-263 (lines=12) @@ | ||
| 249 | * @param callable $function ($value, $key) |
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| 250 | * @return Collection |
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| 251 | */ |
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| 252 | function filter($collection, callable $function) |
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| 253 | { |
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| 254 | $generatorFactory = function () use ($collection, $function) { |
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| 255 | foreach ($collection as $key => $value) { |
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| 256 | if ($function($value, $key)) { |
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| 257 | yield $key => $value; |
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| 258 | } |
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| 259 | } |
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| 260 | }; |
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| 261 | ||
| 262 | return new Collection($generatorFactory); |
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| 263 | } |
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| 264 | ||
| 265 | /** |
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| 266 | * Returns a lazy collection with items from all $collections passed as argument appended together |
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| @@ 420-431 (lines=12) @@ | ||
| 417 | * @param callable $function ($value, $key) |
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| 418 | * @return Collection |
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| 419 | */ |
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| 420 | function each($collection, callable $function) |
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| 421 | { |
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| 422 | $generatorFactory = function () use ($collection, $function) { |
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| 423 | foreach ($collection as $key => $value) { |
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| 424 | $function($value, $key); |
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| 425 | ||
| 426 | yield $key => $value; |
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| 427 | } |
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| 428 | }; |
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| 429 | ||
| 430 | return new Collection($generatorFactory); |
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| 431 | } |
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| 432 | ||
| 433 | /** |
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| 434 | * Returns an item with $key key from $collection. If that key is not present, throws ItemNotFound. |
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| @@ 496-505 (lines=10) @@ | ||
| 493 | * @param callable $function ($value, $key) |
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| 494 | * @return Collection |
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| 495 | */ |
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| 496 | function indexBy($collection, callable $function) |
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| 497 | { |
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| 498 | $generatorFactory = function () use ($collection, $function) { |
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| 499 | foreach ($collection as $key => $value) { |
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| 500 | yield $function($value, $key) => $value; |
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| 501 | } |
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| 502 | }; |
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| 503 | ||
| 504 | return new Collection($generatorFactory); |
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| 505 | } |
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| 506 | ||
| 507 | /** |
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| 508 | * 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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