promise function not recognizing external variable

Question

While I have been working in python for quite some time, I've recently started working with javascript for its tight integration with Web.

I am still struggling with concepts of event driven programming and promise driven function.

Anyway, Below I am using node.js module is-port-reachable. It does a good job of returning status if given host is reachable over a given port or not. However, I need to collect combined info of host and port status.

For e.g. if I have hosts = ['hostA' , 'hostB' ];

I need to collect status of its port scan status as

hosts2 = [ ('hostA' , true) , ('hostB', false)];

With below code, I am able to get individual status of port scan for each host, but when I try to add it to array host2, its coming back as empty. It seems promise function is not able to take/recognize external variable aHost.

const isPortReachable = require('is-port-reachable');

hosts = [ 'host' , 'host2'];
var hosts2  = new Array();

for ( var l = 0; l < hosts.length; l++) {
    var aHost = hosts[l];
    const myFunction = (aHost) =>{
    return isPortReachable(8443, {host: aHost})
    };
    myFunction(aHost).then(result => {
    console.log(aHost, result);
    hosts2.push((aHost,result));
    });
}
console.log(hosts2);

Output: Further, Looks like console.log(hosts2); is getting executed before for loop.

node myscript.js
[]
hostA true
hostB false

Any help is appreciated.