mrzasa

> user.devices.all.uniq.class
=> Device::ActiveRecord_AssociationRelation
# so that we can chain more AR methods
> user.devices.all.uniq.limit(1)
=> [Device]

> u.devices.uniq.class
=> Array
# so we can only work on array:
> user.devices.uniq.limit(1)

gabeodess

module Arel::Predications
  def has_key(right)
    Arel::Nodes::HasKey.new(self, quoted_node(right))
  end
end

class Arel::Nodes::HasKey < Arel::Nodes::Binary
  def operator; :"?" end
end

brianhempel

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

DTFagus

javascript: (function() {

    var root = $(document.getElementsByTagName('html'));
    var watchers = [];
    var attributes = [];
    var attributes_with_values = [];
    var elements = [];
    var elements_per_attr = [];
    var scopes = [];

xdite

1. Get You a Hug, Every Friday

FridayHug.com http://fridayhug.com

2. Run From a Single File

The Smallest Rails App http://thesmallestrailsapp.com

%w(action_controller/railtie coderay).each &method(:require)