FAQ: Router Parameters - Review


This community-built FAQ covers the “Review” exercise from the lesson “Router Parameters”.

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This exercise can be found in the following Codecademy content:

Web Development

Learn Express

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This is ridiculous. Everything is the same, I went even as far as to copy-paste the code from the spice exercise and then refactor it to this exercise. Still, it is still not good enough. “Did you sent the same error resposne for a nonexistent spice?” my shiny behind…

const express = require(‘express’);
const app = express();
const bodyParser = require(‘body-parser’);


const PORT = process.env.PORT || 4001;

const vendingMachine = [
id: 1,
name: ‘Gum’,
price: 1.25,
id: 7,
name: ‘Bag of chips’,
price: 3.50,
id: 23,
name: ‘cumin’,
price: .75,

let nextSnackId = 24;


// Add your code here:
app.param(‘snackId’, (req, res, next, id) => {
const snackIndex = vendingMachine.findIndex(snack => {
return snack.id === Number(id);
if (snackIndex !== -1) {
req.snackIndex = snackIndex;
} else {

app.get(’/snacks/’, (req, res, next) => {

app.post(’/snacks/’, (req, res, next) => {
const newSnack = req.body;
if (!newSnack.name || !newSnack.price) {
res.status(400).send(‘Snack not found!’);
} else {
newSnack.id = nextSnackId++;

app.get(’/snacks/:snackId’, (req, res, next) => {

app.put(’/snacks/:snackId’, (req, res, next) => {
vendingMachine[req.snackIndex] = req.body;

app.delete(’/snacks/:snackId’, (req, res, next) => {
vendingMachine.splice(req.snackIndex, 1);

app.listen(PORT, () => {
console.log(Server is listening on port ${PORT});

I mean, seriously. If you will only accept a specific configuration, a least spare me the two-faced questions. I just don’t care anymore, I will ask for the solution, but felt like I need to report this. Or I may be overreacting, it is quite possible with my current frustration level. What is wrong with my code?