Problem 1

Implement a function allWithProgress() that tracks the progress as each promise resolves. use Promise.all() underneeth.

const promises = [
    new Promise((resolve) => setTimeout(() => resolve("task 1"), 1000)), 
    new Promise((resolve) => setTimeout(() => resolve("task 2"), 2000)), 
    new Promise((resolve) => setTimeout(() => resolve("task 3"), 3000))
];

function promiseAllWithProgress(promises) {
    let complete = 0;
    return Promise.all(promises.map(promise => {
        return promise.then((result) => {
            complete++;
            const percentage = (complete / promises.length) * 100;
            console.log(percentage);
            return result;
        })
    }));
}

promiseAllWithProgress(promises).then(result => {
    console.log(result);
});

// output

//33.33333333333333
//66.66666666666666
//100
//[ 'task 1', 'task 2', 'task 3' ]