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Ruby and Rails Study Roadmap

Motivation

Is Rails still relevant in 2018 ?

The Philosophy of

AWS Regions

Region Code	Region Name	Availability Zones
us-east-1*	N. Virginia	`us-east-1a` `us-east-1b` `us-east-1c` `us-east-1d` `us-east-1e`
us-east-2	Ohio	`us-east-2a` `us-east-2b` `us-east-2c`
us-west-1*	N. California	`us-west-1a` `us-west-1b` `us-west-1c`
us-west-2	Oregon	`us-west-2a` `us-west-2b` `us-west-2c`
eu-west-1	Ireland	`eu-west-1a` `eu-west-1b` `eu-west-1c`
eu-central-1	Frankfurt	`eu-central-1a` `eu-central-1b`

UFW

I use Ubuntu’s Uncomplicated firewall because it is available on Ubuntu and it's very simple.

Install UFW

if ufw is not installed by default be sure to install it first.

Getting Started with Clojure on Windows

Clojure is an amazingly powerful language. Using it (and watching Rich Hickey videos) has changed the way I think about programming, and the way I code in general. Once I learned the basics of the language, which was a relatively quick process, I fell in love and couldn't look back. I hope this post can help others who are new to Clojure get up and running quickly and painlessly.

This post is opinionated in the sense that I'll suggest certain tools to help those who are new to this scene get on their feet. The things you'll need are:

Leiningen (pronounced LINE-ing-en) - This is like a package manager, build tool, task manager, and more in one tool. Think npm or nuget, but with more capabilities. There is at least one other build tool for Clojure (boot), but Leiningen is the most widely used.
JDK - Clojure runs on Java. Throw out any qualms you may have about Java, we aren't coding in Java (though we can through Clojure, and sometimes tha

Complete Recent Discord Quest

Note

This no longer works in browser!

Note

This no longer works if you're alone in vc! Somebody else has to join you!

How to use this script:

Accept the quest under User Settings -> Gift Inventory

Naming Classes Without a 'Manager'

Accepts input as a list of UTF-32 codepoints and returns a Number.

High-Level

let isNewline: Number -> Boolean =
  (x: Number) -> x == 10

let isDigit: Number -> Boolean =
  (x: Number) -> (x >= 48) && (x < 58)

Basic Control Flow

Given an arbitrary program:

@main def lcm(a: Int, b: Int): Int =
  if(a < b) (a * (b / gcd(b, a))
  else (b * (a / gcd(a, b))

def gcd(a: Int, b: Int): Int =
  if(b == 0) a

	type CachingMap[K comparable, V any] struct {
	// double buffering mechanism
	index int64
	maps [2]map[K]V

	// write queue
	queue chan struct {
	key K
	value V
	}

	-- Remove the history from
	rm -rf .git

	-- recreate the repos from the current content only
	git init
	git add .
	git commit -m "Initial commit"

	-- push to the github remote repos ensuring you overwrite history
	git remote add origin git@github.com:<YOUR ACCOUNT>/<YOUR REPOS>.git