Describe (in plain English) what Array.map() does?

it’s a method in javascript that used to iterate over an array and calling function on every element of array and return value.

Describe (in plain English) what Array.reduce() does

it’s a method in javascript that accumulate the values for each element of the array, resulting in a single output value.

Provide code snippets showing how to use superagent() to fetch data from a URL and log the result

With normal Promise .then() syntax

superagent.get(“url”).then((respone)=>{ console.log(response.body) })

Again with async / await syntax

const asyncFunction = async ()=>{ await superagent.get(“url”).then((response)=>{ console.log(response.body) }) } asyncFunction();

Explain promises as though you were mentoring a Code 301 level student

Promises are used to handle asynchronous operations in JavaScript. They are easy to manage when dealing with multiple asynchronous operations A promise can be created using Promise constructor. Syntax

var promise = new Promise(function(resolve, reject){ //do something });

Are all callback functions considered to be Asynchronous? Why or Why Not?

taking a callback doesn’t make a function asynchronous. There are many examples of functions that take a function argument but are not asynchronous. For example there’s forEach in Array. It iterates over each item and calls the function once per item.