How to solve this asynchronous task?

Question

Node.js

Hello, I'm not that good at asynchronous programming yet, and this task blows my mind:
I have an array of unchecked proxies, which I pass to the checkProxy function, from which I would like to receive a promise with checked proxies:

checkProxy(proxies).then(valid_proxies => {
        console.log(valid_proxies) //в valid_proxies лежит массив отвалидированных прокси
})

Checking one proxy or proxy-check looks like this:

proxy_check(proxy).then(r => {
     // прокси рабочий
});

It turns out that I need to iterate over all elements of the proxies array and call proxy_check for each, but I don’t understand how to wait for all checks to complete and return an array of only proxies that passed the test. Can you help with this?

Answer 1

Promise.all(proxies.map((p) => check(p)))
.then((check_results) => check_results.filter(....))