push the output to a array code example

Example 1: javascript array push

let animals = ["dog","cat","tiger"];

animals.pop(); // ["dog","cat"]

animals.push("elephant"); // ["dog","cat","elephant"]

Example 2: what does results.push({}) nodejs mean

const mongoose = require('mongoose');

var data = async function () {

    const array = await mongoose.connection.collection("organizations").find({}).toArray(function(err, result) {
        if (err) throw err;
        return result.map(r => r.name);
    });

    console.log(array); //this shows only [] meaning that the array is now empty.
                        //this is shown in the log before the first log
    return array;
};

module.exports = {
    data: data,
};