Odd and Even Sum

function printEvenAndOddSums(num) {
    let evenSum = 0;
    let oddSum = 0;
    let digits = num.toString().split('').map(Number);
    for (let digit of digits) {
        digit % 2 === 0 ? evenSum += digit : oddSum += digit;
    }

    return `Odd sum = ${oddSum}, Even sum = ${evenSum}`;
}

function sumOddAndEvenNumbers(input) {
    let digits = input.toString().split('').map(Number);
    let evenSum = a => a.filter(b => b % 2 === 0).length === 0 ? 0 : a.filter(b => b % 2 === 0).reduce((x, y) => x + y);
    let oddSum = a => a.filter(b => b % 2 !==0).length === 0 ? 0 : a.filter(b => b % 2 !==0).reduce((x, y) => x + y);
    console.log(`Odd sum = ${oddSum(digits)}, Even sum = ${evenSum(digits)}`);
}