Bruce Park treble37

1. Gemfile

gem 'browserify-rails', '1.5.0' # until fix: https://github.com/browserify-rails/browserify-rails/issues/101
gem 'react-rails'

Browserify-rails allows to use browserify within assets pipeline. React-rails is here only to allow to use #react_component (and thus, prerendering).

Note that jquery-rails can be removed from Gemfile, the npm version of jquery and jquery-ujs will be used instead.

Comparative Benchmark Numbers @ Rackspace

I've taken the benchmarks from Matthew Rothenberg's phoenix-showdown, updated Phoenix to 0.13.1 and ran the tests on the most powerful machines available at Rackspace.

Results

Framework	Throughput (req/s)	Latency (ms)	Consistency (σ ms)

When should you use DateTime and when should you use Time?

It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:

>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000

SOLID Principles with ruby examples

SRP - Single responsibility principle

A class should have only a single responsibility.

Every class should have a single responsibility, and that responsibility should be entirely encapsulated. All its services should be narrowly aligned with that responsibility, this embrace the high cohesion.

OCP - Open/closed principle

Software entities should be open for extension, but closed for modification.

	defmodule ROP do

	defmacro try_catch(args, func) do
	quote do
	(fn ->
	try do
	unquote(args) \|> unquote(func)
	rescue
	e -> {:error, e}
	end

	class Bob
	def reply_to(statement)
	public_send("reply_to_#{statement.class}".downcase.to_sym)
	rescue NoMethodError
	default_reply
	end

	def reply_to_silence
	"Fine. Be that way!"
	end

	require "net/http"

	def start_server
	# Remove the X to enable the parameters for tuning.
	# These are the default values as of Ruby 2.2.0.
	@child = spawn(<<-EOC.split.join(" "))
	XRUBY_GC_HEAP_FREE_SLOTS=4096
	XRUBY_GC_HEAP_INIT_SLOTS=10000
	XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
	XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

	/*
	********************************************************************************
	Golang - Asterisk and Ampersand Cheatsheet
	********************************************************************************

	Also available at: https://play.golang.org/p/lNpnS9j1ma

	Allowed:
	--------
	p := Person{"Steve", 28} stores the value

	/* open up chrome dev tools (Menu > More tools > Developer tools)
	* go to network tab, refresh the page, wait for images to load (on some sites you may have to scroll down to the images for them to start loading)
	* right click/ctrl click on any entry in the network log, select Copy > Copy All as HAR
	* open up JS console and enter: var har = [paste]
	* (pasting could take a while if there's a lot of requests)
	* paste the following JS code into the console
	* copy the output, paste into a text file
	* open up a terminal in same directory as text file, then: wget -i [that file]
	*/

	{
	"presets": ["es2015", "react", "babel-preset-stage-0"]
	}