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23 lines
451 B
23 lines
451 B
--TEST--
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count array_unique result for duplicate detection
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--FILE--
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<?php
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function duplicate_count(array $values): int
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{
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$allValues = count($values);
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$uniqueValues = count(array_unique($values));
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return $allValues - $uniqueValues;
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}
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function main(): void
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{
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var_dump(duplicate_count(['a', 'b', 'a', 'c', 'b']));
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var_dump(duplicate_count([1, '1', true, 2]));
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var_dump(duplicate_count([]));
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}
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?>
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--EXPECT--
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int(2)
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int(2)
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int(0)
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