Class 02 | Classes, Inheritance, Functional Programming

Video: TDD in JS
Video: JavaScript Context Tutorial
Article: MDN Inheritance
Article: MDN this
Article: MDN - ES6 Classes

Review Tidbits

Why would you want to run JavaScript code outside of a browser?

• When you want to run a program that uses JS as it’s backend language for programming continuity; when you want your whole stack to be in JS

What is the difference between a module and a package?

• Nothing in the grand scheme. The word is interchangable. They are both things you can download or use with a CDN link to use their methods in your JS files. If you want to get picky, some say a module is a single file for use, whereas the package is several files and had a package.json with it

What does the node package manager do?

• It’s a command you can use in the terminal npm install xyz and it allows you to install, delete, update, create, etc packages.

Provide code snippets showing 3 different ways to export a function from a node module

• module.exports.tea = tea;
• module.exports = {Cat: Cat}
• exports.foo = 'foo';

Document the following Vocabulary Terms
Term | Defition
–|–
ecosystem | In the context of software analysis, the term software ecosystem is defined by Lungu as “a collection of software projects, which are developed and co-evolve in the same environment”. The environment can be organizational (a company), social (an open-source community), or technical (the Ruby ecosystem). Software Ecosystem Node.js | An event-driven, non-block i/o JavaScript runtime (basically translates the frontend language JS into a usable back-end version of JS to work with servers and databases) V8 Engine | V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++. It is used in Chrome and in Node. js, among others. It implements ECMAScript and WebAssembly, and runs on Windows 7 or later, macOS 10.12+, and Linux systems that use x64, IA-32, ARM, or MIPS processors. v8.dev module | Also known as “package”. JS files that contain reusable methods you can use in your project BUT usually a single file not the full package with several package | Also known as “module”. JS files that contain reusable methods you can use in your project OR it is a collection of modules that uses a package.json file node package manager (npm) | A website/registry that hosts open source packages for JavaScript. You can find or create packages through npm
server | A server is a computer or system that provides resources, data, services, or programs to other computers, known as clients, over a network. In theory, whenever computers share resources with client machines they are considered servers environment | An environment is the context in which code is executing. This includes all code executables and variables available to the code being executed. You can think of an environment as a unique machine executing code. Each machine is a different environment. Linden Melvin interpreter | In computer science, an interpreter is a computer program that directly executes instructions written in a programming or scripting language, without requiring them previously to have been compiled into a machine language program. Wikipedia compiler | A compiler is a special program that processes statements written in a particular programming language and turns them into machine language or “code” that a computer’s processor uses. tech target

Upcoming Lecture

Which 3 things had you heard about previously and now have better clarity on? 1) ES6 Classes 2) Inheritence 3) Context

Which 3 things are you hoping to learn more about in the upcoming lecture/demo? 1) Test driven development - no idea anything about this yet 2) Hoisting as classes 3) object oriented design

What are you most excited about trying to implement or see how it works?

• classes

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