MixedSetIterableImplementation::partialIntersection()

Complexity

Conditions	7
Paths	14

Size

Total Lines	26
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	15
CRAP Score	7

Importance

Changes	1
Bugs	0	Features	1

<?php
    public static function partialIntersection(bool $strict, int $m, iterable ...$sets): \Generator
    {
        $iterator = new \MultipleIterator(\MultipleIterator::MIT_NEED_ANY);

        foreach ($sets as $set) {
            $iterator->attachIterator(IteratorFactory::makeIterator($set));
        }

        $usageMap = [];

        foreach ($iterator as $values) {
            foreach ($values as $value) {
                if ($value === null) {
                    continue;
                }

                $hash = UniqueExtractor::getString($value, $strict);

                if (!isset($usageMap[$hash])) {
                    $usageMap[$hash] = 0;
                }

                $usageMap[$hash]++;

                if ($usageMap[$hash] === $m) {
                    yield $value;
                }