DusanKasan /
Knapsack
| @@ 1275-1287 (lines=13) @@ | ||
| 1272 | * @param array|Traversable ...$collections |
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| 1273 | * @return Collection |
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| 1274 | */ |
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| 1275 | function diff($collection, ...$collections) |
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| 1276 | { |
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| 1277 | $valuesToCompare = toArray(values(concat(...$collections))); |
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| 1278 | $generatorFactory = function () use ($collection, $valuesToCompare) { |
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| 1279 | foreach ($collection as $key => $value) { |
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| 1280 | if (!in_array($value, $valuesToCompare)) { |
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| 1281 | yield $key => $value; |
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| 1282 | } |
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| 1283 | } |
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| 1284 | }; |
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| 1285 | ||
| 1286 | return new Collection($generatorFactory); |
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| 1287 | } |
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| 1288 | ||
| 1289 | /** |
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| 1290 | * Returns a lazy collection of items that are in $collection and all the other arguments, indexed by the keys from the |
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| @@ 1297-1309 (lines=13) @@ | ||
| 1294 | * @param array|Traversable ...$collections |
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| 1295 | * @return Collection |
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| 1296 | */ |
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| 1297 | function intersect($collection, ...$collections) |
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| 1298 | { |
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| 1299 | $valuesToCompare = toArray(values(concat(...$collections))); |
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| 1300 | $generatorFactory = function () use ($collection, $valuesToCompare) { |
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| 1301 | foreach ($collection as $key => $value) { |
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| 1302 | if (in_array($value, $valuesToCompare)) { |
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| 1303 | yield $key => $value; |
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| 1304 | } |
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| 1305 | } |
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| 1306 | }; |
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| 1307 | ||
| 1308 | return new Collection($generatorFactory); |
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| 1309 | } |
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| 1310 | ||
| 1311 | /** |
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| 1312 | * Returns a lazy collection where keys and values are flipped. |
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