#google #waits #for #you

google_waits_for_you.js

Function.prototype.toString = function() {
    return this();
}

const multiplier = (...args) => {
    if (args.length === 0) {
        return multiplier;
    }
    const rest = args.splice(1);
    if (rest.length === 0 && Array.isArray(args[0])) {
        return args[0][0];
    }
    const result = rest.reduce((r, n) => r * n, Array.isArray(args[0]) ? args[0][0] : args[0]);
    return (...args2) => multiplier([result], ...args2);
}

console.log(`${multiplier(2, 3, 4, 5, 6)} === 720`);
console.log(`${multiplier(2, 3)(4, 5, 6)} === 720`);
console.log(`${multiplier(2, 3)(4, 5, 6)(1)} === 720`);
console.log(`${multiplier(2)(3)(4)(5)(6, 1)} === 720`);