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Programming Fundamentals: Variables

Learning Objectives

Introduction

In this exercise you will learn how to declare and use Javascript variables

Setup

  • Fork this repository and clone your forked version to your machine

  • Install dependencies by running the command below while in the project's root directory:

    npm ci

Instructions

  • Read through the numbered comments in the following files to understand the requirements of this exercise.

    • src/declaration.js
    • src/assignment.js

  • Write your code directly below the numbered comment.

  • Add console.log()s to get visibility on your solution and run the file with the command node src/<file>.js etc

  • See src/example.js for some examples

Running Tests

Functional Tests

  • To verify your solutions, run the test suite by running the npx jasmine command followed by the path to the corresponding test file for each src/*.js file above, eg:

    npx jasmine spec/declaration.spec.js

  • Alternatively, run:

    npm test

  • To begin with, almost all of the tests will fail - example tests, if they exist, will pass with a green . You'll see many red Fs in your console, like the image below:

  • Your solution is complete when the all the red Fs have been replaced with green .s in your console, as shown below:

Formatting Tests

When you try to git commit any work you've staged using git add, there is an additional test that runs that checks the formatting of your work against a set of rules we've defined. To run these tests locally use the following:

$ npx eslint src

You will then need to resolve the errors before successfully committing your work. You can also do this automatically with this command - but try to understand what well-formatted code looks like so you don't simply rely on this magic fix!

$ npx eslint src --fix

NB: If you fix these formatting errors, don't forget to git add and then git commit your changes before git push back to your remote repository

Extensions

  • Extension exercises can be found in the src/extensions directory with corresponding tests in the spec/extensions directory.

  • To run the tests for the extensions, you can either run spec files individually as follows:

    npx jasmine spec/extensions/<file>.spec.js

  • Alternatively, run:

    npm run test-extensions

Advanced extensions

Similarly to the extensions, run the /spec/advanced/<file>.spec.js scripts.