Archimidis

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

Archimidis

class ApplicationController < ActionController::Base
  ...
  # FORCE to implement content_for in controller
  def view_context
    super.tap do |view|
      (@_content_for || {}).each do |name,content|
        view.content_for name, content
      end
    end
  end

Archimidis

class ApplicationController < ActionController::Base
  # ...

  unless Rails.application.config.consider_all_requests_local
    rescue_from Exception, with: lambda { |exception| render_error 500, exception }
    rescue_from ActionController::RoutingError, ActionController::UnknownController, ::AbstractController::ActionNotFound, ActiveRecord::RecordNotFound, with: lambda { |exception| render_error 404, exception }
  end

  private
  def render_error(status, exception)

Archimidis

class ModelName
  # declare papaerclip :avatar file
  # ...
  after_validation :avatar_reverted?
  
  def avatar_reverted?
    unless self.errors[:avatar_file_size].blank? or self.errors[:avatar_content_type].blank?
      self.avatar.instance_write(:file_name, self.avatar_file_name_was) 
      self.avatar.instance_write(:file_size, self.avatar_file_size_was) 
      self.avatar.instance_write(:content_type, self.avatar_content_type_was)

Archimidis

namespace :remote_rake do
	desc 'Run a task on a remote server.'
	# run like: cap remote_rake:invoke task="db:reset"
	task :invoke do
		run("cd #{deploy_to}/current && bundle exec rake #{ENV['task']} RAILS_ENV=#{rails_env}")
	end
end

Archimidis

<script>
(function(w, d, s) {
  function go(){
    var js, fjs = d.getElementsByTagName(s)[0], load = function(url, id) {
	  if (d.getElementById(id)) {return;}
	  js = d.createElement(s); js.src = url; js.id = id;
	  fjs.parentNode.insertBefore(js, fjs);
	};
    load('//connect.facebook.net/en_US/all.js#appId=272697932759946&xfbml=1', 'fbjssdk');
    load('https://apis.google.com/js/plusone.js', 'gplus1js');

Archimidis

<!-- /app/views/admin/users/new_invitiations.html.erb -->

<h2>Send invitation</h2>

<%= form_for @user, :url => send_invitation_admin_users_path do |f| %>
   
   <table style='width: 50%'>
     <tr>
   		<td><%= f.label :first_name %></td>
   		<td><%= f.text_field :first_name %></td>

Archimidis

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

Archimidis

'use strict';

function createPersonRepository() {
  const persons = [{
    id: 1,
    name: 'Archimedes'
  }, {
    id: 2,
    name: 'Plato'
  }, {

Archimidis

##Reactive System Design Links

#Articles and Papers

• The Reactive Manifesto: http://www.reactivemanifesto.org/
• https://en.wikipedia.org/wiki/Reactive_programming
• https://en.wikipedia.org/wiki/Functional_reactive_programming
• Design Methods for Reactive Systems book slides: http://booksite.elsevier.com/9781558607552/slides/slides.pdf
• Programming without a callstack Event Driven Architectures By G Hohpe: http://www.eaipatterns.com/docs/EDA.pdf
• On Distributed Memory Systems: http://blog.paralleluniverse.co/2012/07/10/on-distributed-memory/
• Disruptor source code, papers and articles: https://lmax-exchange.github.io/disruptor/