DusanKasan /
Knapsack
| @@ 1270-1282 (lines=13) @@ | ||
| 1267 | * @param array|Traversable ...$collections |
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| 1268 | * @return Collection |
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| 1269 | */ |
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| 1270 | function diff($collection, ...$collections) |
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| 1271 | { |
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| 1272 | $valuesToCompare = toArray(values(concat(...$collections))); |
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| 1273 | $generatorFactory = function () use ($collection, $valuesToCompare) { |
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| 1274 | foreach ($collection as $key => $value) { |
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| 1275 | if (!in_array($value, $valuesToCompare)) { |
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| 1276 | yield $key => $value; |
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| 1277 | } |
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| 1278 | } |
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| 1279 | }; |
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| 1280 | ||
| 1281 | return new Collection($generatorFactory); |
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| 1282 | } |
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| 1283 | ||
| 1284 | /** |
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| 1285 | * Returns a lazy collection of items that are in $collection and all the other arguments, indexed by the keys from the |
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| @@ 1292-1304 (lines=13) @@ | ||
| 1289 | * @param array|Traversable ...$collections |
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| 1290 | * @return Collection |
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| 1291 | */ |
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| 1292 | function intersect($collection, ...$collections) |
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| 1293 | { |
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| 1294 | $valuesToCompare = toArray(values(concat(...$collections))); |
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| 1295 | $generatorFactory = function () use ($collection, $valuesToCompare) { |
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| 1296 | foreach ($collection as $key => $value) { |
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| 1297 | if (in_array($value, $valuesToCompare)) { |
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| 1298 | yield $key => $value; |
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| 1299 | } |
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| 1300 | } |
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| 1301 | }; |
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| 1302 | ||
| 1303 | return new Collection($generatorFactory); |
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| 1304 | } |
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| 1305 | ||
| 1306 | /** |
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| 1307 | * Returns a lazy collection where keys and values are flipped. |
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