js append vs push code example
Example 1: javascript append array to end of array
const new_array = old_array.concat([value1[, value2[, ...[, valueN]]]])
Example 2: append an array
// initialize array
var arr = [
"Hi",
"Hello",
"Bonjour"
];
// append new value to the array
arr.push("Hola");
console.log(arr);