NoedJS forEach with add new element on a http-request - node.js

Question

how to add new element in an array with a http request.
I have a code like this but it doesn't add new element because of async on nodejs and I don't know how can I pass it.
arr = [
{ id: 123},
{ id: 124},
{ id: 125},
{ id: 126},
]
arr.forEach(function(row, index) {
request.post('/test')
.then((data) => {
row.status = "success"
})
.catch((error) => {
row.status = "failed"
});
});
so that i can achieve something like this.
[
{ id: 123, status: 'success' },
{ id: 124, status: 'failed' },
{ id: 125, status: 'failed' },
{ id: 126, status: 'success' },
]
I'm new in NodeJs. thank you guys

Answer 1

You have to use Promise.all because you're handling several promises:
let arr = [
{ id: 123},
{ id: 124},
{ id: 125},
{ id: 126}
]
Promise.all(arr.map((row, index) => {
return request.post('/test')
.then(data => {
row.status = "success"
})
.catch(error => {
row.status = "failed"
});
})).then(() => console.log(arr))

Answer 2

You can try this popular node module Async. Try this .each here http://caolan.github.io/async/docs.html#each.
async.each(arr, _your_function, (err) => {
// check success
})
_your_function(){}

Answer 3

use async.eachOf, you can access element and index in the array.
var async = require("async");
var arr = [
{ id: 123},
{ id: 124},
{ id: 125},
{ id: 126},
];
async.eachOf(arr, function(e, i, ecb){
request.post('/test',)
.then( (data) => {
e.status = "success"
return ecb(null);
})
.catch( (error) => {
e.status = "failed"
return ecb(null);
});
}, function(err){
if(err)
{
console.log("err");
}
else
{
console.log(arr);
}
});