Question

How to check if a matrix rows contain numbers without repetition in PHP

Answer 1

function hasUniqueNumbersInRows($matrix) {
    foreach ($matrix as $row) {
        // Check if the row has duplicates
        if (count($row) !== count(array_unique($row))) {
            return false; // A row contains duplicates
        }
    }
    return true; // All rows have unique numbers
}

$matrix = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 7]
];

if (hasUniqueNumbersInRows($matrix)) {
    echo "All rows contain unique numbers.";
} else {
    echo "Some rows contain duplicate numbers.";
}



/*
run:

Some rows contain duplicate numbers.

*/

 

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