js how to iterate over an array?

Question

JavaScript

There is an array
ports = [];
I fill it with lines (using lodash):

_.each(data.ports_variables, function(val){
                ports.push(val.ifName);
})

But here's the problem

console.log(ports[0]);
->undefined

The various iterations just don't work, as if it's empty, although if you do
console.log(ports);
That, a list of values ​​is displayed, what could be the problem? How can you iterate over the entire array?

Answer 1

Perhaps you are iterating in a callback to some kind of asynchronous function? request type

Answer 2

Everything is working fine, you are doing something wrong
https://jsfiddle.net/rxLomLLw/

Answer 3

Why is Array.prototype.forEach bad? Everyone forgot about the good old for ...