Sprint Challenge: JavaScript Fundamentals

PATRICK STEVENSON

This challenge allows you to practice the concepts and techniques learned over the past week and apply them in a survey of problems. This Sprint explored JavaScript Fundamentals. During this Sprint, you studied variables, functions, object literals, arrays, this keyword, prototypes, and class syntax. In your challenge this week, you will demonstrate proficiency by completing a survey of JavaScript problems.

Instructions

Read these instructions carefully. Understand exactly what is expected before starting this Sprint Challenge.

This is an individual assessment. All work must be your own. Your challenge score is a measure of your ability to work independently using the material covered through this sprint. You need to demonstrate proficiency in the concepts and objectives introduced and practiced in preceding days.

You are not allowed to collaborate during the Sprint Challenge. However, you are encouraged to follow the twenty-minute rule and seek support from your TL and Instructor in your cohort help channel on Slack. Your work reflects your proficiency in JavaScript fundamentals.

You have three hours to complete this challenge. Plan your time accordingly.

Commits

Commit your code regularly and meaningfully. This helps both you (in case you ever need to return to old code for any number of reasons) and your team lead.

Description

You will notice there are several JavaScript files being brought into the index.html file. Each of those files contain JavaScript problems you need to solve. If you get stuck on something, skip over it and come back to it later.

In meeting the minimum viable product (MVP) specifications listed below, you should have a console full of correct responses to the problems given.

Self-Study Questions

Demonstrate your understanding of this week's concepts by answering the following free-form questions.

Edit this document to include your answers after each question. Make sure to leave a blank line above and below your answer so it is clear and easy to read by your team lead

1. Describe the biggest difference between .forEach & .map.

.forEach does not return a new array; it modifies the array it's called on in place. .map does return a new array, and does not modify the array it's called on.

2. What is the difference between a function and a method?

A method is a type function that is defined within an object, class, or prototype. Methods are called via objects using dot syntax. Function is a more broad category and includes functions defined and called independently of objects, classes, or prototypes

3. What is closure?

A closure occurs when a function is defined within another function, and the nested function uses a variable/constant defined within the function scope of its parent. The value of that variable/constant is then enclosed and preserved within the nested function. If the parent function returns the nested function, the enclosed value would continue to exist, even after the parent function has had its stack garbage collected.

4. Describe the four rules of the 'this' keyword.

1. Global Binding This is used without any local context, so it refers to the window or console.

2. Implicit Binding This is used within an object, so it refers to the object.

3. New Binding This is used within a constructor function, so it refers to the object created by calling the constructor.

4. Explicit Binding This is overridden by .call, .apply, or .bind, so it refers to the object passed to those functions.

5. Why do we need super() in an extended class?

super(), together with extends, links the child class to the parent class, causing the child to inherit properties and methods from the parent class.

Project Set up

Follow these steps to set up and work on your project:

• Create a forked copy of this project.
• Add TL as collaborator on Github.
• Clone your OWN version of Repo (Not Lambda's by mistake!).
• Create a new Branch on the clone: git checkout -b <firstName-lastName>.
• Create a pull request before you start working on the project requirements. You will continuously push your updates throughout the project.
• You are now ready to build this project with your preferred IDE
• Implement the project on your Branch, committing changes regularly.
• Push commits: git push origin <firstName-lastName>.

Follow these steps for completing your project:

• Submit a Pull-Request to merge Branch into master (student's Repo).
• Add your team lead as a Reviewer on the Pull-request
• TL then will count the HW as done by merging the branch back into master.

Minimum Viable Product

Your finished project must include all of the following requirements:

Pro tip for this challenge: If something seems like it isn't working locally, copy and paste your code up to codepen and take another look at the console.

Task 1: Objects and Arrays

Test your knowledge of objects and arrays.

• Use the objects-arrays.js link to get started. Read the instructions carefully!

Task 2: Functions

This challenge takes a look at callbacks and closures as well as scope.

• Use the functions.js link to get started. Read the instructions carefully!

Task 3: Prototypes

Create constructors, bind methods, and create cuboids in this prototypes challenge.

• Use the prototypes.js link to get started. Read the instructions carefully!

Task 4: Classes

Once you have completed the prototypes challenge, it's time to convert all your hard work into classes.

• Use the classes.js link to get started. Read the instructions carefully!

In your solutions, it is essential that you follow best practices and produce clean and professional results. Schedule time to review, refine, and assess your work and perform basic professional polishing including spell-checking and grammar-checking on your work. It is better to submit a challenge that meets MVP than one that attempts too much and does not.

Stretch Problems

There are a few stretch problems found throughout the files, don't work on them until you are finished with MVP requirements!