JsObjects

by Charlie Calvert

This repository contains sample code by Charlie Calvert for his classes and for Elvenware. In it you will find various sample JavaScript, HTML, CSS, Node, Bash scripts, and Python Projects.

To properly install a read-only copy of JsObjects first create a directory called ~/Git if it does not already exist:

mkdir ~/Git

Note that this directory should be a subdirectory of your home directory.

Now navigate to that directory and clone JsObjects from GitHub:

cd ~/Git
git clone https://github.com/charliecalvert/JsObjects.git

Get JsObjects

A more complete script would run my UbuntuSetup to set up node development with a JsObjects style. It will install node and add a number of global npm utilities. The script looks like this:

#! /usr/bin/env bash

cd ~/.

mkdir -p Git

cd Git

git clone https://github.com/charliecalvert/JsObjects.git
cd JsObjects/Utilities/SetupLinuxBox/
./UbuntuSetup

Comment out cd ~/. if you don't want to start in the home directory. Insert a comment with the hash mark:

# cd ~/.

To download, do this:

curl https://s3.amazonaws.com/bucket01.elvenware.com/JsObjects/get-jsobjects

This will echo it to the screen to rite it to a file do something like this:

curl https://s3.amazonaws.com/bucket01.elvenware.com/JsObjects/get-jsobjects > get-jsobjects

To make it executable, do this:

chmod +x get-jsobjects

Setup SSH

This will set up your ssh directory:

#! /bin/bash

cd
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

Download it:

curl https://s3.amazonaws.com/bucket01.elvenware.com/JsObjects/ssh-setup
curl https://s3.amazonaws.com/bucket01.elvenware.com/JsObjects/ssh-setup > ssh-setup

Sometimes you need to install openssh:

sudo apt install ssh

More details are here.

Overview

I have many different example programs stored in this repository. Note especially the Utilities and JavaScript directories. And many other things as well.

All the code in JsObjects is released under the MIT license.

Core Setup

Students in my classes, and readers of my text, should have JsObjects setup correctly on their systems. In particular, I suggest creating a virtual machine that runs the Ubuntu Linux OS. You can then install JsObjects on it and perform the necessary setup without causing any conflicts with code on your primary machine. You don't have to do things this way, but it is perhaps the simplest course of action for many readers.

On modern Ubuntu based Linux systems, you can quickly and easily perform the setup by running the UbuntuSetup script. I have tested this script extensively, however, I think it is best to run it on a freshly minted VM running in a tool such as VirtualBox or VMware. When I install a fresh copy of Ubuntu, Lubuntu or Mint either in a VM or directly to metal, this is usually the first thing I do. I hesitate recommending that you do this on other systems simple because it adds the commands specified here to your .bashrc file. The script also installs a fresh copy of NodeJs. There are various ways to install node, and it is probably not best to mix one with another. Hence I recommend a fresh install of an Ubuntu based distro before proceeding, unless you are sure you do not have Node installed already.

If you are using Pristine Lubuntu then this script has already been run, and running it a second time will rarely cause damage unless you have done something odd your instance of Pristine Lubuntu. If all all else fails, I strongly recommend just downloading a fresh copy of Pristine Lubuntu.

• Pristine VirtualBox Assignment

NOTE: This script will save your current .bash_aliases file as .bash_aliases.old and will install a new .bash_aliases file. It will also append text to the end of your .bashrc file.

Choose either the first or second option from the script's menu:

Ubuntu
  a) Run All (Basic and Node Related)
  b) Run Basic Setup (All but Node Related)

The first will install node and set up your system for work in my classes. The second will set up your system, but will not install node.

When you are done, type the following:

source ~/.bashrc

If you want more details, go here: Core Setup

NOTE: It is best not to edit the files in a repository that you do not own, such as JsObjects. If you want to edit a file or other entity such as a project, I suggest coping it to another location on your hard drive. If you have a bit of experience with Git, then an alternative is to create a fork of the repository.

Navigating JsObjects

JsObjects is big and hard to navigate. I have, however, created a series of Bash aliases that can help you quickly find what you are looking for by only entering a few keystrokes.

For instance, from the Bash prompt, you should be able to type jo to quickly get to ~/Git/JsObjects. Typing joj should take you to ~/Git/JsObjects/JavaScript. If these shortcuts are working on your system, then that is a sign that it is setup correctly. If they are not working, try running the UbuntuAndCloudNineSetup script as described above.

These aliases are stored near the bottom of my .bash_aliases file, which is found here. The .bash_aliases file is referenced in your .bashrc file and should be run automatically whenever you open a Bash shell. As implied above, your .bashrc file can also be processed by typing:

source ~/.bashrc

Students in my classes, and readers of my assignments and texts, will find that I often reference these aliases. Rather than asking you type a long path such as ~/Git/JsObjects/JavaScript/NodeCode, I will ask you to run the jon alias. Of course, none of this will work unless you first set up your system correctly as described above.

Node Install

On Windows, run the install found at the nodejs site.

On Linux, you can run the UbuntuAndCloudNineSetup described above.

Learn more about it here:

• Configure Linux and Node Install
• Node on Elvenware
• NPM Global Installs

Grunt

There are a few grunt tasks defined. One would be:

npm run lint

This will use Grunt to lint the files in the root JsObjects directory.