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gem install less --no-ri --no-rdoc
gem install therubyracer --no-ri --no-rdoc

lessc app/assets/stylesheets/less/mobile/common/core.less > app/assets/stylesheets/css/mobile/core.css

1) delete associated css file(s) for modified less file(s) from public/assets/***.css
2) bundle exec rake assets:precompile

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# resource - http://richardlog.com/post/12743073497/pretty-printing-json-and-xml-on-mac-osx

# Formatting XML
cat unformatted.xml | xmllint --format - > formatted.xml

# Formatting JSON
cat unformatted.json | python -m json.tool > formatted.json

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Toggle Wireless Mode

This script will allow switching between managed and monitor mode for a wireless adapter.

Managed mode is the default wireless adapter mode.

Monitor mode allows monitoring all traffic received on a wireless channel and allows packets to be captured without having to associate with an access point.

Environment

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Deploy Facebooks' React VR TourSample to Heroku in 5 minutes or less

Step by step instructions for deploying react-vr/tree/master/Examples/TourSample to Heroku.

Demo

https://serene-retreat-76943.herokuapp.com/index.html

Shout-outs to:

1. Facebook for their VR framework React VR.

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http://robots.thoughtbot.com/post/47202759358/using-gdb-to-inspect-a-running-ruby-process

That’s not a great thing to have to say, is it? However, I bet you’ve said it before and may not have immediately know why.

With liberal use of puts and maybe pry, you can figure out what a problem might be next time you run it, but sometimes you need to figure out what that problem is right now.

As it turns out, and I know this is a shocker, Ruby processes are just regular processes. They can be debugged with gdb.

Having recently had the need to find out why a job of mine was running particularly slowly, I found out about this lovely tool the hard way: frantic googling. I found some very useful functions for gdb in a blog post by Rasmus on Ruby callstacks.

kany

Rails 5 and ActionCable

Assumptions: The application already exists. You have two models article.rb and comment.rb. Articles have two attributes, title and text. Comments have two attributes, text and article_id. See these instructions if you need help getting started.

Routes

Assuming that you are nesting your :comments resources inside of :articles, mount ActionCable and make sure you have a root.

config/routes.rb

Rails.application.routes.draw do

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Mounting VirtualBox shared folders on Ubuntu Server 18.04 LTS (Bionic Beaver)

This guide will walk you through the steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest.

Prerequisites

This guide assumes that you are using the following setup:

• Oracle VM VirtualBox version 6.0.10 with Extension Pack installed
• Microsoft Windows 7 SP1 as the host OS
• A fresh install of Ubuntu Server 18.04.2 LTS as the guest OS

You could still make this guide work with other setups (possibly with some modifications to the commands and whatnot).

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The following explains how to install the Whitespace Bundle for TextMate2.

1) mkdir -p ~/Library/Application\ Support/Avian/Bundles
2) cd ~/Library/Application\ Support/Avian/Bundles
3) git clone https://github.com/mads379/Whitespace.tmbundle.git
4) Open TextMate > Preferences
5) Create a Variable named 'Invalid' with a value of 'Red'(or whatever color you choose)
6) Restart TextMate

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Source: https://www.wired.com/story/5-useful-terminal-tricks-for-mac/

Set shutdown timer

sudo shutdown -h \+60

Cancel shutdown timer

sudo killall shutdown

Prevent machine and display from falling asleep

caffeinate -u -t 3600

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Testing Stripe Webhooks + Rails 6 on your local machine

The document describes how to test Stripe Webhooks with Ruby On Rails on your local machine. Information in this document is current as of 4/22/2021.

• Rails 6.1.3.1
• Ruby 2.7.3p183
• Stripe 1.5.14