dscataglini

class Product < ActiveRecord::Base
  CONTEXTS = %w{institutions individuals basic_individuals}
  acts_as_list
  named_scope :with_context, lambda{ |context| { :conditions => "contexts_mask & #{ 2**CONTEXTS.index( context ) } > 0" } }
  named_scope :visible, :conditions => {:visible => true}
  named_scope :visible_position, :order => "position"
  has_many :media_assets, :as => :attachable, :dependent => :destroy
  after_update :save_media_assets
  
  def new_media_assets=(attributes)

dscataglini

def font_size_matrix(default = 16)
  puts "px\t%\t\s\sem"
  (10..26).each do |n|
    val = (n * 100) / default.to_f
    puts "#{n}px\t%0.1f%%\t\s\s%0.3fem" % [val, val/100]
  end
end  

font_size_matrix

dscataglini

gem install linecache
Building native extensions.  This could take a while...
ERROR:  Error installing linecache:
	ERROR: Failed to build gem native extension.

/Users/developer/.rvm/rubies/rbx-head/bin/rbx extconf.rb
creating Makefile

make
gcc -I. -I/Users/developer/.rvm/rubies/rbx-head/include -I/Users/developer/.rvm/rubies/rbx-head/include -I.  -fPIC -ggdb3 -O2 -fPIC  -c trace_nums.c

dscataglini

From 02edb2d2de470bec7bcdd030bb05ed7c7c967907 Mon Sep 17 00:00:00 2001
From: Diego Scataglini <[email protected]>
Date: Wed, 24 Nov 2010 12:11:20 -0500
Subject: [PATCH] gsub! should raise runtime error on frozen strings when block is given and match is found

---
 kernel/common/string.rb |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/common/string.rb b/kernel/common/string.rb

dscataglini

def yield_if?(bool = false, value = nil)
  yield(value) if bool && block_given?
  bool
end

dscataglini

module MyRakeContext
  class MyClass < ::MyClass
    #... different logic here
  end

  rakeCommand()
end

dscataglini

hash = Hash.new(&(p = lambda{|hsh, key| hsh[key] = Hash.new(&p)}))
# now you can do this
hash[:this][:is][:very][:cool] = "Yeah baby, yeah ... " 
#=> "Yeah baby, yeah ... " 
hash 
#=> {:this=>{:is=>{:very=>{:cool=>"Yeah baby, yeah ... "}}}}

dscataglini

# this is an experiment that I tried about 3 years ago.
# instead of calling asset.attachable.post.user.login just calling asset.login
 
class User <  ActiveRecord::Base #fields are :login, :email
  has_many :posts
  has_many :channels
end

class Channel <  ActiveRecord::Base #fields are :private(bool), :channel_type, :name
  belongs_to :user

dscataglini

# Usage include Categorizable::Categorized or Categorizable::Categorizable

module Categorizable
  module Categorized
    def self.included(klass)
      associations = [
            [:has_many, :categorings],
            [:has_many, :content_categories, {:through => :categorings}],
            [:has_one,  :primary_categoring, {:conditions => {:primary => true}, :class_name => "Categoring"}],
            [:has_one,  :primary_content_category, {:through => :primary_categoring}]          

dscataglini

var start = new Date();
var end = new Date();
end.setDate(end.getDate() + 7);

$.fullCalendar.gcalFeed("http://www.google.com/calendar/feeds/b878ac83tpkjckoqh1mccmsrfk%40group.calendar.google.com/public/basic",{currentTimezone: 'America/New_York'})(start, end, function(events){
    var now = new Date();
    var VALID_SHOW_TITLES = ["The Ruby Show", "The Conversation", "The Big Web Show", "The Dev Show", "EE Podcast"];
    // auto detect from the page title if we should check for the next show for this page
    var current_page_belongs_to_show = $.grep(VALID_SHOW_TITLES, function(el, idx){
      return document.title.indexOf(el) > -1;