CODEWITHSUNDEEP
javascriptnode.jsasynchronouses6-promise
dattatreya sarma
dattatreya sarma

Reputation: 81

How to call a method multiple times (dynamically) in asynchronous way in node.js

I am writing a script in node.js where I have method with a single parameter - id.

funcToCall(id)
{
    // some code ...

    returns a promise
}

var ids = [ list of ids] // input occurs dynamically

I will get a list of id's as input and I need to call the method with each input id in an asynchronous way. I have found a way to handle Promise.all() for the static/fixed number of method calls

const reflect = p => p.then(v => ({v, status: "fulfilled" }),
                        e => ({e, status: "rejected" }));

var arr = [ fun(id1), fun(id2), fun(id3) ];      // how to make this dynamically ?

Promise.all(arr.map(reflect)).then(function(results) {
    var success = results.filter(x => x.status === "fulfilled");
});

Is there any possible way to dynamically call the method multiples times and in an asynchronous way?

Thanks in advance!!

Upvotes: 0

Views: 68

Answers (1)

Ashish Modi
Ashish Modi

Reputation: 7770

You could use .map on arrays and use Promise.all like this

function funcToCall(id) {
  return Promise.resolve(id); // this could be your promise.
}

const ids = [1, 2, 3, 4];

Promise.all(ids.map(id => funcToCall(id))).then((res = console.log(res)));

Upvotes: 1

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