refactor

index.js

const operations = {
    ",": commaOperation,
    "|": pipeOperation,
    "?": markQuestionOperation,
    "/": backSlashOperation,
}

function add(a, b) {
    if (typeof a === 'string') {
        for (const [key, operation] of Object.entries(operations)) {
            if (a.includes(key)) {
                return key === "/" ? operation(a, b) : operation(a);
            }
        }
    }

    const parsedA = parseInt(a);
    const parsedB = parseInt(b);
    return parsedA + parsedB;
}

function commaOperation(a) {
    const numbers = a.split(',').map(num => parseInt(num.trim()));
    return numbers.reduce((sum, num) => sum + num, 0);
}

function pipeOperation(a) {
    const numbers = a.split('|').map(num => parseInt(num.trim()));
    return numbers.reduce((sum, num) => sum + num, 0);
}

function markQuestionOperation(a) {
    const numbers = a.split('?').map(num => parseInt(num.trim()));
    return numbers.reduce((sum, num) => sum + num, 0);
}

function backSlashOperation(a, b) {
    const [year, month, day] = a.split('/').map(num => parseInt(num.trim()));
    const [year2, month2, day2] = b.split('/').map(num => parseInt(num.trim()));
    return (day + day2);
}

console.log(add(1, 2));
console.log(add("1", "2"));
console.log(add("1,2"));
console.log(add("1|2"));
console.log(add("1?2"));
console.log(add("2025/04/01", "2025/03/22")); // Should give 23 adding the days together