charliepark

  def convert_to_brightness_value(background_hex_color)
    (background_hex_color.scan(/../).map {|color| color.hex}).sum
  end

  def contrasting_text_color(background_hex_color)
    convert_to_brightness_value(background_hex_color) > 382.5 ? '#000' : '#fff'
  end

foysavas

def is_ajax_request?
  if respond_to? :content_type
    if request.xhr?
      true
    else
      false
    end
  else
    false
  end

igrigorik

def tip(msg); puts; puts msg; puts "-"*100; end

#
# 30 Ruby 1.9 Tips, Tricks & Features:
# http://www.igvita.com/2011/02/03/new-ruby-19-features-tips-tricks/
#

tip "Upgrading to Ruby 1.9 is simple: rvm install 1.9.2 && rvm --default 1.9.2"

tip "Ruby 1.9 supports named captures in regular expressions!"

kirs

upstream example_backend {
  server unix:/var/www/example.com/shared/unicorn.sock;
}

server {
  listen 80;
  server_name example.com www.example.com;
  access_log off;
  error_log off;
  client_max_body_size 20M;

cblunt

# ...

gem 'carrierwave'
gem 'fog', '~> 1.0.0' # Need to specify version, as carrierwave references older (0.9.0) which doesn't allow configuration of Rackspace UK Auth URL

kolodiazhnyi

uk:
  errors:
    messages:
      expired: "прострочено, створіть новий"
      not_found: "не знайдено"
      already_confirmed: "вже було підтверджено, спробуйте увійти"
      not_locked: "не було заблоковано"
      not_saved:
        one: "Виникла помилка, через яку неможливо зберегти зміни:"
        other: "Виникли помилки (загалом - %{count}), через які неможливо зберегти зміни:"

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

daz

.ui-autocomplete {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  float: left;
  display: none;
  min-width: 160px;
  _width: 160px;
  padding: 4px 0;

MicahElliott

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

jhjguxin

In this article, I'll walk through a basic Rails (3.2.x) setup for creating a nested resource for two models. Nested resources work well when you want to build out URL structure between two related models, and still maintain a RESTful convention. This code assumes you are running RVM to manage Ruby/Gem versions, and Git for version control.

Creating a new Rails project

$ mkdir family # create rvm gemset 
$ echo "rvm use --create ruby-1.9.2@family" > family/.rvmrc 
$ cd family # install rails 
$ gem install rails # create new rails project 
$ rails new . # version control