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LAB | JS Functions & Arrays

Introduction

Manipulating arrays in code is a very common operation. Whether you are creating a total for a shopping cart, grabbing only the first names out of a list of people, or moving a piece on a chessboard, you are probably going to be modifying or manipulating an array in some way.

Requirements

• Fork this repo
• Clone it to your machine

Submission

• Upon completion, run the following commands:

git add .
git commit -m "Solved lab"
git push origin master

• Create a Pull Request so that your TAs can check your work.

Instructions

You will work on the src/functions-and-arrays.js file, which is already loaded in the index.html file.

To run the JavaScript code open the index.html file use the Live Server VSCode extension.

To see output of your JavaScript code open the Console in the Developer Tools.

While following the instructions for each iteration, make sure to carefully read the instructions to fully understand the task requirements. Do not rush. You should take your time to carefully read every iteration.

Note about tests

This LAB, along with some of the labs you will be working on during the bootcamp, is equipped with unit tests to provide automated feedback on your lab progress.

After you’ve completed the basic iterations, go to the "Test Your Code" section at the bottom. There you'll be asked to install the testing dependencies and run the tests to check how many tests your code is passing.

Iteration #1: Find the maximum

Implement the function maxOfTwoNumbers that takes two numbers as arguments and returns the largest.

Iteration #2: Find the longest word

Implement the function findLongestWord that takes as an argument an array of words and returns the longest one. If there are 2 with the same length, it should return the first occurrence.

You can use the following array to test your solution:

const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];

Iteration #3: Calculate the sum

Calculating a sum can be as simple as iterating over an array and adding each of the elements together.

Implement the function named sumNumbers that takes an array of numbers as an argument, and returns the sum of all of the numbers in the array. Later in the course we will learn how to do this by using the reduce array method, which will make your work significantly easier. For now, let's practice "declarative" way adding values, using loops.

You can use the following array to test your solution:

const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];

Bonus - Iteration #3.1: A generic sum() function

The goal: Learn how to refactor your code.