mostlyobvious

import XMonad
import XMonad.Config.Gnome
import XMonad.Hooks.DynamicLog
import XMonad.Hooks.ManageDocks
import XMonad.Hooks.ManageHelpers
import XMonad.Actions.CycleWS
import XMonad.Actions.WindowGo
import XMonad.Util.WindowProperties
import XMonad.Util.EZConfig
import XMonad.Layout.Named

finack

app = node[:rails][:app]

rails_base app[:name] do
  ruby_ver app[:ruby_ver]
  gemset app[:gemset]
end

%w{config log pids cached-copy bundle system}.each do |dir|
  directory "#{app[:app_root]}/shared/#{dir}" do
    owner app[:deploy_user]

jrochkind

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

pithyless

# A chainable Either monad for Ruby
#
# Examples
#
#  Either.right('s') >> proc { |s| Either.right(s + '-1') } >> proc { |s| Either.right(s + '-2') }
#  #=> #<Either @left=nil, @right="s-1-2">
#
#  Either.right('s') >> proc { |s| Either.left('error!') } >> proc { |s| Either.right(s + '-2') }
#  #=> #<Either @left='error!', @right=nil>
#

sj26

class User < ActiveRecord::Base
  attr_accessible :name

  has_many :admin_memberships, class_name: "Membership", conditions: {role: 'admin'}
  has_many :editor_memberships, class_name: "Membership", conditions: {role: 'editor'}

  def admin?
    admin_memberships.exists?
  end

ms-ati

####
## Ruby port of "A Tale of 3 Nightclubs"
##
## Based on Scala version here: https://gist.github.com/970717
## 
## Demonstrates applicative validation in Ruby, inspired by the blog post:
##   "An example of applicative validation in FSharpx"
##   (http://bugsquash.blogspot.com/2012/03/example-of-applicative-validation-in.html)
####

norman

# coding: utf-8
#
# Encode any codepoint outside the ASCII printable range to an HTML character
# reference (https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_reference_overview).
def encode(string)
  string.each_codepoint.inject("") do |buffer, cp|
    cp = "&#x#{cp.to_s(16)};" unless cp >= 0x20 && cp <= 0x7E
    buffer << cp
  end
end

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

maxim

#!/usr/bin/env ruby
#
# This script is an astonishing feat of top notch
# rockstar craftsmanship. It totally uses artificial
# intelligence to extract colors out of tmTheme and
# build an itermcolors scheme file for iTerm2.
#
# I know this sounds crazy, but it actually knows
# approximately what colors should be used in the
# ANSI list, and tries to find nearest colors from

pzol

Monadic vs Imperative

Here is a comparison of two pieces of code that do basically the same thing.

So what we have here is a chain of functions depending on each other, each consecutive takes the result of the previous one for further processing. If either of them fails, the rest shall not be executed.

1. validate parameters received from the outside world in a Hash
2. convert one of the parameters into an object
3. do a search in the database