Dennis Dashkevich dskecse

TIL attr_* methods are optomized.

class Whatever
  def foo
    @foo
  end

  attr_reader :bar
end

Thoughts about Rails Presenters

This is a collection of links, examples and rants about Presenters/Decorators in Rails.

The "Decorator" pattern slowly started gaining popularity in Rails several years ago. It is not part of core Rails, and there's many different interpretations about how it should work in practice.

Jay Fields wrote about it in 2007 (before he switched back to Java and then Clojure): http://blog.jayfields.com/2007/03/rails-presenter-pattern.html

Spurred by recent events (https://news.ycombinator.com/item?id=8244700), this is a quick set of jotted-down thoughts about the state of "Semantic" Versioning, and why we should be fighting the good fight against it.

For a long time in the history of software, version numbers indicated the relative progress and change in a given piece of software. A major release (1.x.x) was major, a minor release (x.1.x) was minor, and a patch release was just a small patch. You could evaluate a given piece of software by name + version, and get a feeling for how far away version 2.0.1 was from version 2.8.0.

But Semantic Versioning (henceforth, SemVer), as specified at http://semver.org/, changes this to prioritize a mechanistic understanding of a codebase over a human one. Any "breaking" change to the software must be accompanied with a new major version number. It's alright for robots, but bad for us.

SemVer tries to compress a huge amount of information — the nature of the change, the percentage of users that wil

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Originally taken from here, cached as a gist so I can find it later. "Angolmois" is a music video game, that plays real BeatMania files, so it's a pretty full-featured game. At least, as full as you're gonna find in Rust from as long ago as it was started.

Angolmois Rust edition went through six different Rust releases without almost no change on the features, and the changes are as follows:

0.6 to 0.7 took 1,179 lines of diff. (Angolmois is about 6,000 lines long.)
0.7 to 0.8 took 1,622 lines of diff.
0.8 to 0.9 took 1,119 lines of diff.
0.9 to 0.10 took [2,248 lines of diff](https://github.com/lifthrasiir/angolmois-rust/compare/661a7d2..

	REQUIRE_DATA = {}
	BUNDLED_GEMS = `bundle show \| grep "*" \| awk '{print $2}'`.split("\n").sort
	require 'bigdecimal'

	def require(name)
	start = Time.now
	ret = super
	stop = Time.now
	total = BigDecimal(stop-start, 6)
	REQUIRE_DATA[name] = total if BUNDLED_GEMS.include?(name)

	// Noty - http://ned.im/noty/#/about
	// Best in place - https://github.com/bernat/best_in_place
	$(document).on('best_in_place:error', function (event, request, error) {
	'use strict';
	// Display all error messages from server side validation
	$.each(jQuery.parseJSON(request.responseText), function (index, value) {
	if (typeof value === "object") {
	value = index + " " + value.toString();
	}

	class CreateUserForm
	include ActiveModel::Model

	attr_accessor :email
	attr_accessor :name

	def initialize
	@user = User.new
	end

	module Publisher
	extend self

	# delegate to ActiveSupport::Notifications.instrument
	def broadcast_event(event_name, payload={})
	if block_given?
	ActiveSupport::Notifications.instrument(event_name, payload) do
	yield
	end
	else

Dennis Dashkevich dskecse

Thoughts about Rails Presenters

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

OS X 10.10 Guide

1. Install Xcode 6

2. Install the Command Line Tools (CLT)