// Example: Generating 4 unique random single-digit numbers (0-9)
function generateFourDigits() {
    let digits = new Set();
    while(digits.size < 4) {
        let randomNum = Math.floor(Math.random() * 10);
        digits.add(randomNum);
    }
    return Array.from(digits);
}

console.log(generateFourDigits()); // Outputs something like: [3, 7, 0, 5]